Fuel Pump Sock Clogged? 287 Most Correct Answers

Invisible and often forgotten, fuel filters are a small but critical part of a vehicle’s fuel delivery system. Here’s what can happen if you neglect yours.

It’s easy to forget your car’s fuel filters, but you might regret it if you do. Here’s what you need to know to protect your fuel delivery system and ensure a smooth ride.

Most vehicles have two fuel filters. There’s one in the fuel tank, often called a strainer (which costs $25-$100) and one in the main fuel line (usually less than $20). The filter material consists of plastic or specially coated pleated paper. Fuel filters are designed to keep dirt, rust, debris, and other contaminants from entering the fuel pump, injectors, and engine without affecting fuel pressure.

Gasoline fuel filters are rated in microns. Most modern vehicles with fuel injection systems use filters between 10 and 30 microns in size. (A micron is 0.001mm. By comparison, a human hair is approximately 70 microns, or 0.08mm.) This is critical because modern engines have extremely tight tolerances for the fuel system and engine components. Due to their abrasive nature, combined with the high fuel pressure of fuel injected engines, foreign particles that get past a faulty or dirty fuel filter can cause blockages that cut off fuel delivery and damage your engine.

5 signs of a bad fuel filter

Poor engine performance

Under heavy loads, a clogged fuel filter can cause the engine to hesitate, jerk or stutter randomly. This tends to be more pronounced under acceleration, especially on a steep incline. Although there may be no symptoms under normal driving conditions, a clogged fuel filter will result in the engine not receiving additional fuel during rapid acceleration. Depending on the extent of the fuel restriction caused by a dirty filter, an engine can also jerk or stutter at different speeds.

Hard start

Unless completely clogged, a bad fuel filter will rarely prevent your engine from starting. On a vehicle that has never had a fuel filter changed, the dirty filter can cause erratic fuel flow, resulting in longer than usual cranking before the engine will start. Consult your owner’s manual for filter change intervals.

stall

An engine that repeatedly stalls while driving could warn you of a dirty fuel filter. Again, depending on the severity of the clog, your car can start right back up with no noticeable loss of power. As clogging worsens and fuel delivery becomes more sporadic, stalling becomes excessive or worsens under acceleration. It is likely that the filter is completely clogged and it is time for a replacement.

Random misfire or rough idle

A clogged fuel filter causes low fuel pressure resulting in a lean fuel condition and engine misfire. This can lead to poor fuel economy, rough idling, and possibly the check engine light coming on. Once the lights are on, it’s time for a trip to the workshop.

Failures of fuel system parts

A noisy, damaged, or failed fuel pump can be caused by a clogged fuel filter. A clogged fuel filter prevents the correct amount of fuel from reaching the engine. The fuel pump tries to compensate for a bad fuel filter, which puts excessive pressure on the fuel pump motor, causing the pump to fail prematurely.

Contaminants that get past a dirty fuel filter can damage, clog, or leak a fuel injector, leading to all kinds of engine driving problems. Unless it totally fails, replacing a dirty fuel filter and servicing or flushing the injectors (done by the pros) should get you back on the road at minimal cost.

The main line fuel filter is replaceable. But before you go the DIY route, make sure the engine is cold, you have the right tools, and depressurize the fuel system by pulling the fuel pump fuse (check the owner’s manual for where it’s located ) and run the engine until it shuts off. Releasing the fuel pressure is crucial because you don’t want gas splattering all over the engine or the floor. Be on the safe side and still have a fire extinguisher nearby.

Replace all O-rings, gaskets and gaskets. Replace all mounting brackets and verify that all retaining clips are reinstalled correctly. Of course, check for leaks after installation.

There are several other reasons for engine power loss and drivability issues, but it’s worth checking the condition of the fuel filter first. It’s an inexpensive and easy solution.

Your fuel filter is exactly what it sounds like. It’s a filter that sits on top of your fuel line and keeps things like dirt and rust from getting into your engine.

When these contaminants get into your engine, they can cause all sorts of problems. They can wear out your fuel pump and injectors quickly and severely affect your car’s performance because the fuel is not being burned properly.

Your fuel filter needs to be replaced regularly. If you have an older car, you probably need to replace it every 40,000 miles or so.

The conditions in which you drive are not taken into account. For example, if you live in a dusty area, you will need to change your fuel filter more frequently due to the amount of dust.

Today’s newer cars usually include the fuel filter as part of the fuel pump assembly – and you need to replace it every 5 years or about 30-50,000 miles.

I recommend looking up your owner’s manual for the specific service interval as it varies between brands.

This is especially important if you have a diesel powered vehicle – as there are fungi that can grow in the diesel and then clog your filter, causing your fuel pump assembly to explode.

That’s not what you want. The bill certainly isn’t pretty, ranging from $400 to $700.

So it’s worth paying attention to. Here are some signs that you may need to change your fuel filter.

So how do you know if your fuel filter is bad?

1: Difficulty starting your car

If you didn’t know your car even had a fuel filter until now, and you’re pretty sure you’ve never changed it, then pay attention to how your car starts. One of the first signs of a bad fuel filter is difficulty starting your car. A clogged fuel filter restricts fuel flow to your engine, which can cause your engine to run lean due to a lack of fuel.

2: Car jerks when driving uphill

When your fuel filter is clogged, gasoline will not flow through the filter as efficiently, which can cause your car to shake when additional fuel is needed, such as when driving. B. when driving uphill. A clogged fuel filter will cause your fuel pump to work harder under load, which can also lead to fuel pump damage. We’ll get to that in a moment.

3: Burns more fuel than usual

If your Toyota Corolla’s fuel economy is starting to feel like a Hummer, you might want to take a look at your fuel filter.

When your fuel filter becomes clogged, your engine can run lean, causing it to waste fuel as it works harder to keep your car moving. Changing your fuel filter can reduce stress and increase mileage.

4: Reduced engine power

If you have an increased engine load, e.g. If you notice a loss of power, for example when driving fast, your fuel filter may be to blame.

If your fuel filter is clogged, your engine’s fuel needs cannot be adequately met by the supply from the tank because the fuel filter is clogged.

5: Engine stalls when idling

Leaving your dirty fuel filter unresponsive for too long can cause your engine to stall. This can occur when the engine is subjected to additional stress, e.g. B. when driving uphill or when accelerating.

However, if you ignored the clogged fuel filter, your engine could stall right after starting due to insufficient fuel getting to the engine.

6: Fuel pump failure

As I mentioned earlier, a bad fuel filter will cause your fuel pump to work harder than it should.

And at the end of the day, I have no problem working hard.

However, if your fuel pump is working too hard, it may decide it needs a permanent vacation.

If your fuel pump explodes, changing your fuel filter will not fix the problem. But hey, sometimes it’s good to know. Aside from sending your fuel pump to the Bahamas, a clogged fuel filter can have other consequences.

A bad fuel filter can cause a car not to start

We are often asked if a bad fuel filter can cause a car not to start. The answer is yes – it can absolutely prevent your car from starting. However, you really have to get your fuel filter plugged for this to happen.

Again, your fuel filter is literally a screen. Enough dirt must build up on it over time to completely restrict fuel flow to the engine. To get to this point, it has to be BAD

And when I mean bad, I mean worse than Walt in Breaking Bad.

That’s probably too controversial for this article, so I’ll leave it at that.

If you have a diesel engine, sometimes your fuel filter can become completely clogged due to diesel fuel microbes and the black, smelly mess they produce.

What does a bad fuel filter sound like?

There are a few noises your car might be making that can alert you to a bad fuel filter. Because the fuel filter is just that – a filter that makes no noise on its own.

However, a clogged fuel filter can affect other parts of your car. By listening for these noises and looking at the other symptoms, you can identify a bad fuel filter.

1: Fuel pump load

When you turn on your car, it’s perfectly normal for your fuel pump to make a faint hum while it’s running. If you sit near the fuel tank and listen, you might be able to hear it if it’s running normally.

However, when the fuel pump is working overtime to make up for a bad fuel filter, it starts to wear out. Then you know there is a problem.

If you hear a loud howl or rumble, your fuel pump is worn out as it overheats from working too hard.

While it’s entirely possible that your fuel pump is just old, it’s also possible that a clogged fuel filter is causing the pump to wear out prematurely.

2: Engine stuttering or coughing

If your engine sounds like it’s choking out a lung, your fuel system may be compromised due to a bad fuel filter.

This should be especially noticeable as you accelerate to higher speeds and the demands on the engine increase.

A stalling engine alone does not necessarily mean your fuel filter is bad, as other components in your engine or your fuel system may be causing the problem.

However, if you’re noticing a stuttering noise along with some of the other issues I’ve mentioned, it’s worth having your fuel filter checked before your fuel pump decides to take a vacation.

3: Engine misfires

If you notice your engine misfiring when you accelerate, your fuel filter may be at fault.

When your fuel filter becomes clogged, the fuel supply to the engine is reduced, resulting in less than the optimal amount of fuel being burned, which in turn leads to misfires.

If you want to test this, try accelerating smoothly up to 65 mph on the freeway and listen for the characteristic pop of engine misfire.

Engine misfire alone does not mean your fuel filter is bad. A lot of things can be wrong – so watch out for the other symptoms on this list!

How to check your fuel filter

I’ll be honest with you – if you have a newer car, checking your fuel filter is a pain. While many older cars have a fuel filter that you can access from the engine bay, most newer models have the fuel filter right next to the gas tank.

So if you read an article that tells you it’s easy to check, unless you have an older car, you’re going to be scammed.

To change your fuel filter you’ll either have to drop the fuel tank itself or hope you’re one of the lucky ones with access to the fuel tank under the back seat.

If you are reading this article I am assuming that you are not a mechanic by trade.

Your best bet is to take your car to a mechanic and have your fuel filter checked for you, unless you have an older car where the fuel filter is in the engine bay.

If that happens to be you, check out this great ChrisFix video that may help you change it.

How much does a clogged fuel filter cost?

The fuel filter itself is inexpensive. It’s literally a piece of paper in a metal or composite case. Depending on the fuel filter your car uses, a new fuel filter can cost anywhere from $20 to $50.

It’s an average of about $35 for nearly $1 billion of claims we’ve processed.

However, as mentioned earlier, replacing the fuel filter yourself on a newer car is a hassle. So when you take your car to the mechanic, it shouldn’t take more than 30 minutes to fix your fuel filter.

That will leave you between $40 and $60 in labor assuming it’s just the fuel filter you’re changing.

Total cost: $85 or so.

Worried about a bad fuel filter destroying your fuel pump?

A fuel pump repair can cost upwards of $500, which can be a huge drain on your wallet.

If you’ve had a bad fuel filter in your car for too long, it’s possible that your fuel pump or fuel pump assembly has been weakened to the point of being almost dead.

And that’s the last thing you want.

Luckily, if you have a vehicle maintenance contract with Protect My Car, if your fuel pump fails, we’ll step in and cover the entire cost of repairing it at no extra cost to you

All of our policy options cover your fuel pump including our Ambassador line which covers older vehicles up to 300,000 miles.

If you’d like to learn more about how effortless it can be to drive with a Protect My Car vehicle maintenance contract, request a quote below and we’ll show you just how great your driving experience can be.

View Full Version : Does the sock have to be picked up at the tank?

Tow Truck After two weeks of replacing ignition components, I finally traced an intermittent engine jam problem to a clogged filter sock at the end of the fuel line intake in the gas tank. I think I cleaned the recently replaced tank (plastic) I got from ebay badly. Lots of rust and small fibers cover the sock, which was almost new when I replaced the tank. Tank cleaned again with solvent and reinstalled without sock. Seems like the filter on the carb would be a lot easier to remove/replace if there is a restriction in the future. Any thoughts on the need to replace the sock?

badaboom tow truck,

Good question?

Lots of rust and small fibers cover the sock, which was almost new when I replaced the tank. Tank cleaned again with solvent and reinstalled without sock. Seems like the filter on the carb would be a lot easier to remove/replace if there is a restriction in the future. Any thoughts on the need to replace the sock? I agree with what you say.

Although you have to live with all contaminants in your fuel line/system other than just in the tank.

I tell myself 😀

I say keep the sock. (field selection)

[ Jan 13 2005 1:49 pm: Message edited by: badaboom ]

roadgrime I run two filters, one on the carburettor and one directly after the tank in front of my electric fuel pump. But even when I had the mechanics, I had the torture near the tank. no real need for the other, other than I expect it might keep the pickup from sucking to the bottom of the tank. I personally prefer to get the crap out of the tank in a canister filter and then just replace it when I see crap in it.

AMXHunter rust particles tear the diaphragm in the stock fuel pump. leave the sock on

If the tanks are that rusty, consider dropping them and kreeming the inside. It works and it’s not that difficult.

By the way, if the membrane ruptures, you know where the gas is going, don’t laugh.gif

thejum57 Just my 2 cents, my sock was dirty, couldn’t find a replacement so I put a filter just outside the tank, still have the one on the carb. No problem.

letank No sock here for the last 25,000, but when I pulled on the gas tank… the sock had already burst

and yes i have a filter in front of the chosen one. Fuel pump and one after it … and yes, the filter crumbs with small metal particles ….

And yes, I need a new gas tank

Chevelleguy AMXHunter is right. I’m replacing the pickup in my tank with no sock. Sucked some junk out of the tank and hung a valve in the fuel pump. Stuck on the first trail in Ouray and had to replace the pump. Put a filter in front of the pump and you should be good.

pensky2 The sock in the tank is really there to filter out water. Water molecules are larger than those of gasoline. The sock allows fuel to pass through, but not water. The sock was not designed to trap dirt. I don’t run with a sock in the tank either. I have a new one but it hasn’t aged enough yet, I’ll install it in the next few days

Towtruck Thanks for the advice…think I’ll definitely put a filter in front of the fuel pump. BTW this is a used plastic tank and I suspect the rust and fibers on the sock were from the old pickup and sock that literally dissolved in the tank… probably sat in a junkyard for twenty years and gotten water inside… at least it’s not split like the old one. Thanks again.

Great Pharoah TowTruck, replace the sock. Blowing out fuel lines with air isn’t much fun, and when the lines start to clog, or better yet, partially clog, you can be in a world of injuries. Imagine you’re driving down I35, just driving along, when suddenly your engine starts to stall just as the a$$ hole in the overloaded Peterbilt with bad brakes flies open behind you. 😮 😮 The sock prevents that from happening and no in-line filter can do that without clogging. With the same scary results.

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Auto Solutions is a full service auto repair shop in Orlando, FL that includes taking care of your vehicle’s fuel system. If you’ve ever run out of gas, you know your car, truck, or utility vehicle cannot run without fuel. There are four common problems that plague automotive fuel systems. Here’s what they are and what causes them in the first place.

1. Bad or clogged fuel injectors

Fuel injectors have special nozzles that spray gasoline directly into the intake manifold or cylinders. Your engine uses this gas by combining it with air to create the perfect conditions for combustion. The burning of air and gasoline—combustion—creates carbon deposits, and these deposits can clog the fuel injectors. Your fuel injectors can also fail if they get stuck in the open or closed position.

2. Clogged fuel filter

Fuel filters remove sediment and other contaminants from your vehicle’s gasoline before it is sent to the fuel injectors. Not only will this help keep the injectors from clogging with this sediment, but it will also protect the engine from harmful deposits. A clogged fuel filter reduces engine performance and could introduce fuel contaminants into the engine, damaging it.

3. Clogged or leaking fuel lines

The fuel flows through lines in the fuel system and these can also become clogged. They can also leak, which can create dangerous driving conditions in your engine. Excess gasoline can ignite, throwing away your vehicle’s exhaust and even shooting flames out of the tailpipe. Age is usually to blame for clogged or leaking fuel lines. Fuel system maintenance can help prevent fuel line problems.

4. Fuel pump malfunction

All of the above start with the fuel pump. The fuel pump draws the gasoline from the tank, forces it through the fuel lines and fuel filter, and directs it to the injectors so they can spray the gasoline into the engine. The fuel pump can become clogged and it can also malfunction. Older fuel pumps were hydraulic, but new pumps are electric, and if the engine overheats or burns out, the engine will not get gas.

Bonus: The wrong fuel

A problem with the bonus fuel system? Petrol. If you fill up your car with the wrong type of gas, you will notice this in the engine performance. For example, if you drive a high performance sports car and fill the tank with 87 octane fuel, your vehicle will lose power, misfire, knock and possibly even misfire. Always use the vehicle manufacturer’s recommended octane rating.

Auto Solutions in Orlando, FL can help you with your car’s fuel system problems. Call us to make an appointment.

If you are driving your car and find that it is not accelerating properly even after your efforts, it must surely get your attention. Also, if you are having trouble starting your car and you feel a wheel judder, this indicates something serious about your car and it could be a bad fuel pump. Every once in a while most of us have to deal with this problem after thinking how to fix a fuel pump without replacing it!

A bad fuel pump is a common problem that most of us face. That goes for most of us, doesn’t it? Is it really possible to temporarily fix the fuel pump? If you are really concerned about this then here we are to help you know how to get the fuel pump working again.

How do I start a car with a bad fuel pump?

First of all, we strongly recommend taking the car to the mechanic to completely solve the problem. The best solution in the event of a broken or bad fuel pump is to simply replace it. Continuing to use a bad fuel pump will affect your car’s performance even if you know how to fix the fuel pump quickly.

What does a fuel pump do?

1: What is a fuel pump?

A fuel pump is an essential part of a car powered by an internal combustion engine. Older motorcycle engines don’t need a fuel pump at all, as they feed the fuel by gravity from the fuel tank or under high pressure to the fuel injection system.

The fuel pump is an essential part of a car powered by an internal combustion engine.

2: Where is the fuel pump located?

Carbureted engines often use low-pressure mechanical pumps mounted outside the fuel tank, while fuel-injected engines often use electric fuel pumps mounted in the fuel tank. Some fuel injected engines even have two fuel pumps: a low pressure/high volume supply for pumping into the tank and a high pressure/low volume supply for pumping on or near the engine.

The fuel pump is usually electric and is located in the fuel tank.

Fuel pressure must be within certain specifications for the engine to run properly. For example:

If the fuel pressure is too high, the engine will run rough and rich. It does not burn all the pumped fuel, making the engine inefficient and polluting.

If the pressure is too low, the engine will run lean, won’t fire, or stall.

3: What does it do?

A car engine burns a mixture of gasoline and air. Gasoline is pumped out of the tank through a pipe and mixed with air in the carburetor, from which the engine sucks the mixture. In the fuel injection system used on some engines, gasoline and air are mixed in the intake manifold.

The fuel pump sucks the gasoline from the tank through a line to the carburetor.

What a fuel pump does is it draws gasoline from the tank through a tube to the carburetor. The pump can be mechanically driven by the engine – or electrically, in which case it’s usually located next to or even in the fuel tank. The fuel pump delivers the petrol from the tank to the carburetor.

Symptoms of a faulty fuel pump

As a trick to getting a fuel pump working, looking for signs of a bad fuel pump is the best line of defense against sitting on the side of the road waiting for a tow truck:

Firstly, if you think you have run out of gas or there is a problem with the fuel gauge, it may be time that your fuel pump needs replacing.

Second, engine overheating is a not-so-obvious indicator of a possible fuel pump failure. How does a car behave when the fuel pump fails? If the fuel pump is frequently heated within moments of starting the vehicle, as is common with stop-and-go driving patterns, the fuel pump can overheat and also overheat the engine. Usually after driving 15-30 minutes, the car suddenly stops working and the engine gets hot. If the engine starts working properly again after it cools down – just to repeat the behavior – this is a sure sign that the fuel pump is failing.

Third, a bad fuel pump noise, unusual noise, stuttering, or misfiring can also indicate a bad fuel pump. If the flow to the fuel injection system in the vehicle is not consistent, the engine will cause problems. Look out for things like hesitant start or start or trouble starting the vehicle.

How to repair a fuel pump without replacing it?

Most importantly, you must first check and confirm whether your fuel pump is actually bad or not. There are a number of ways you can convince yourself that you have a bad fuel pump. The main indicator of a faulty fuel pump is the low pressure in the engine. A faulty fuel pump lowers the required pressure and upsets the engine’s air-fuel ratio, which is sure to affect the vehicle’s performance.

If you run your car with a bad fuel pump, the pump’s motor will quickly burn out. Engine overheating can also be one of the possible signs of driving with a bad fuel pump. Despite this, to know how to repair a fuel pump without replacing it, there are some solutions. Here’s what you can possibly try.

1. Use the fuel pressure gauge

This can be one of the best alternative solutions as you delve into the different ways to deal with a bad fuel pump to start your car. Even the mechanics use this method when working on a faulty fuel pump. Therefore, if the fuel pump is defective, you can absolutely rely on this method.

All you have to do is connect the fuel pressure gauge to your car’s engine. This way you can somehow start your car with a bad fuel pump and get an idea of ​​​​the actual failure of the car’s engine.

Using the fuel pressure gauge to start a car with a bad fuel pump

2. Apply some pressure from the outside

Another possible solution to the question “how to fix a fuel pump without replacing it” is to put some external pressure on the car. The main problem with the bad fuel pump is that it reduces the pressure required for the car to run, thus causing problems with its performance.

Therefore, the best solution you can try against your need to start your car with a bad fuel pump is to apply some external pressure. The external pressure source maintains the required pressure level for car engine performance.

3. Maintaining engine heat

Maintaining heat in your car’s engine can also potentially be the solution to the need to start your car with a bad fuel pump. The main reason why your car will start even with a bad fuel pump is that once the car has cooled down, the fuel pump resets without the necessary pressure and heat. This will cause immediate malfunctions and affect the vehicle’s performance.

Therefore, the best way to start a car with a bad fuel pump is to maintain a significant amount of heat in a car’s engine. This reduces the frequent malfunctions in the car and stabilizes the car’s performance to the maximum.

Try to keep the car heat at the same level.

SEE MORE :

However, starting a car or looking for ways to repair a fuel pump without replacing it is not advisable. The bad fuel pump, if not taken care of, can bring a number of problems and side effects to the car. The possible side effects that can result from a bad fuel pump are:

Decrease the mileage of the car

Frequent engine failures

power loss

Vary

engine stutters

The rise in temperature of the car engine

To avoid all of these side effects, most car experts generally suggest avoiding a car with a bad fuel pump. You can try the above methods, but the possible risks involved are too high. Get your fuel pump repaired as early as possible to avoid possible side effects on your car and enjoy lasting performance.

Read more car repair tips to better understand your car’s problem.

Your car, truck or SUV’s fuel pump lasts over 100,000 miles on average. Most people never need to have their fuel pumps changed. However, you can tell if your pump is having problems. Willoughby Hills Auto Repair lists eight signs you may need a pump replacement.

fuel tank noise

A damaged fuel pump can create a loud howling noise that you will hear coming from your gas tank. The pump can also make this noise when you are low on fuel or the fuel in your tank is dirty. The normal sound of your pump is a low hum. Loud whining indicates a problem.

Difficult start

When your vehicle’s fuel pump is unable to get gas from the tank to the engine, you are having trouble starting your car. The car will have trouble starting and running because the pump cannot push through enough fuel. A worn pump loses its pressure and the engine runs out of fuel.

sputter engine

Your fuel pump doesn’t stop pumping gas through the engine once you start your vehicle; It also pumps gas to match your vehicle’s speed. If the pump cannot produce a constant flow of gas at higher speeds, your vehicle’s engine will sputter and threaten to die.

The actual stable

If your engine is getting gas from the pump, even less than it needs, it probably won’t stall. However, it will die if the pump causes your engine to overheat. An old and worn pump motor can get too hot and this can overheat your entire motor.

Power failure

If you find your vehicle losing power when climbing steep grades or loading it with cargo, your fuel pump could be the culprit. As at higher speeds, the engine needs more fuel to work under load. You’ll lose power if the pump isn’t working properly.

Surging Power

We’ve talked so far about what happens when the engine doesn’t get enough gas. What happens if he gets too much gas? If the pump pushes too much fuel into the engine, you will notice power surges while driving, ie. H. RPM spikes and dips that…

Lower fuel efficiency

Because your fuel pump is pushing too much fuel into the engine, you’re burning more gasoline than normal. This means more trips to the gas station to feed your car, truck or SUV. If you’re tracking mileage between fills and noticing a drop, this could be your pump.

dead engine

Finally, your vehicle may not start because of the battery, alternator, starter motor, fuel filter, or fuel pump. All of these things play a role in starting your vehicle. If the pump is dead you can’t get gas into the combustion chamber to start the car.

Call Willoughby Hills Auto Repair at for a fuel pump inspection. We are located in Willoughby Hills, OH and we can repair or replace your pump if needed.

Your car’s “Check Engine” or “Service Engine Soon” light can come on for more than 1,400 different reasons. The light is part of your vehicle’s On-Board Diagnostic (OBD) system and can indicate anything from a loose gas cap to a major repair such as a catalytic converter. Here’s another example of a problem the light can trigger…

DTC: P0087 Fuel Rail/System Pressure – Low

Some vehicles are equipped with a returnless fuel supply. This means the fuel pump can vary its speed to deliver fuel as needed, rather than running at a constant speed all the time.

There is a sensor on the fuel rail that monitors fuel pressure and determines if the vehicle needs more or less fuel. When your vehicle’s Engine Control M (ECM) records a code of P0087, it means that the fuel pressure in the system is below specification.

Symptoms of a P0087 diagnostic trouble code can include misfires due to a lean fuel condition, and the vehicle may run rough or have no power when accelerating.

Possible causes:

Weak fuel pump, clogged filter or strainer, restricted fuel supply line

Faulty fuel pump driver module

Faulty fuel pressure sensor

Possible solutions:

Check fuel pressure at fuel rail or fuel line

Check all fuel lines

Check for damaged fuel filter

Check for damage to the fuel tank

What to do when your “Check Engine” light comes on

When your Service Engine Soon light comes on, you don’t know if it’s due to a P0087 or an entirely different issue. The first thing we recommend is to confirm that it is the “Service Engine” or “Check Engine” light. If you are unsure, consult your owner’s manual.

If it’s the check engine light, see if the gas cap is to blame. Make sure the gas cap is tight and that there is no rust or dirt preventing it from sealing. If that all checks out and the light doesn’t go out within the next few miles, consider making an appointment with Auto Lab for further testing. We will be able to pull the code(s) and run pinpoint tests to narrow down the actual culprit. From there we can give you an accurate estimate for the repair.

Check out our detailed guide on how to react when a dashboard warning light comes on.

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