Fuel pump?

Hi,

That sounds like a pressure-related issue. Try this and let me know the results.

1) Turn the key from off to the run position (engine off) and count to 5.

2) Turn the key off and repeat step 1 a total of five times.

3) On the 6th time, see if it starts normally.

Also, let me know what was leaking. Was it a hose or where the pump mounts in the tank?

Let me know.

Joe

Hello Joe, I believe it was gasoline that was leaking from the fuel pump. It was coming from the hose that is mounted on the pump. Also, i have tried switching the ignition on and off a few times before actually turning the car on and it seems to work, however if i come back to the car after it’s been off for a while and try to turn the car on right away it will crank no start once again. It’ll turn on the second attempt only.

Hi,

That is fuel pressure drop-off. The fuel pump is in the tank. The hose where you saw a leak is on the exterior. Are you certain that the leak has been repaired? That will allow fuel pressure to drop and cause a delayed start.

The easiest way to confirm if it is a pressure drop-off is to check fuel pressure and then when you turn the car off, see how fast the pressure drops.

Here is a link that explains how to do it:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

You will need a fuel gauge for this, but most parts stores will lend one to you.

Let me know what you find.

Joe

Hi, I am almost certain that the leak has been repaired as there is no longer any gas leaking outside of the fuel pump, I’ve ran the car for a few minutes with the pumps exposed and nothing seems to leak from either side. However, I am not sure where to find the fuel pressure valve to test the pressure. Any help with where it’s located or how I can test it would be appreciated.

Hi,

I'm not sure I understand exactly what you are looking for. If you are looking to release pressure, I attached the directions below. See pic 1. What is suggested is the removal of the fuel pump relay, starting the engine, and allowing the fuel pressure to be depleted.

If you need the Schrader valve location, either it will be on the fuel rail or it may require the removal of the supply hose at the rail, a T placed in it, and then the gauge mounts to the T.

Let me know.

Joe

I went to my nearest AutoZone and picked up a fuel pressure test kit, however I am not sure where I need to hook it up in order to test the pressure. I disconnected the fuel pump relay but the car only cranks and doesn’t actually start until i put it back on.

Hi,

If it doesn't start, that is because the pressure is too low. That is what we need. If there is no Schrader valve on the fuel rail, they you will need to disconnect the fuel supply where it mounts to the rail, place a T between the two, and then the gauge can be attached to the T.

Some of these have a Schrader valve on the fuel rail, but this one may not.

Joe

if fuel pressure is too low how can I fix this?

Hi,

The pump is new, so I don't think it is low-pressure. What I think happens is when you turn the car off and the pump turns off, the fuel pressure drops too low due to a leak. It could be a few things that cause it, but most commonly, it is a leak or leaky fuel injector.

So, when you check this, we need to pay attention to the pressure when the key is turned off. It will slowly drop to a point, but it won't be too much and will take a bit of time.

Let me know if that helps or if you have other questions.

Take care,

Joe

hmm, okay, but if i remove the backseat and expose both pumps and see no gasoline or leaks anywhere in the area could there still be a leak somewhere else causing this low pressure?

hello, I disconnected the fuel line, however I’m not sure where to connect both sides of the T to, one side i have hooked up to the cable but I’m not sure where to plug the other side in.

I'm not sure what you are referring to when you say cable. When you disconnect the supply hose, one side of the T will go to the supply hose, and the other side will likely need a rubber fuel line to bridge between the T and the fuel rail.

As far as the pressure is concerned, I don't suspect it is a problem. It is when the engine is turned off that I suspect pressure drops too fast. If you look at the pics below, you'll see that within five minutes, it shouldn't drop more than 10 PSI when the pump turns off.

Let me know.

Joe

See pics below.

Hello, I filled up my gas tank last night, and it appears that the passenger side pump is leaking fuel again, do you know why this would be?

Hi,

Can you tell me approximately where it is leaking from? For example, is the leak where the pump attaches inside the tank? Does it appear to be a hose or quick connector?

If I had to guess, I would think it would most likely be a quick connector O-ring that is leaking. Check closely around where the connector is on the pump. Also, this sounds like it is what is causing the delayed start (fuel pressure drop off). With that in mind, I suspect it is a fuel line or connector.

Let me know.

Joe

Hello, so I took a closer look, and it looks like it’s a slow steady leak coming from the O-ring area specifically where the serial numbers are on the ring, i recently filled up my gas tank so I’m thinking maybe that has something to do with it? Below I will provide a picture. I also noticed gas was leaking from directly under the car, would this be for the same reason?

Hi,

Was that o-ring that goes between the tank and module replaced or inspected for damage? As far as the fuel under the vehicle, yes, that certainly could be where it is coming from.

Let me know.

Joe

No this is the same o ring that was originally on it.

Hi,

There is a chance that is the problem. Sometimes when tightening or loosening the retainer, they tear. The only thing we can do is check at this point. You do have it between the module and tank and not the retainer and module, correct?

I wish I had a better answer for you, but like you said, that is where it appears to be leaking.

Let me know your thoughts.

Joe

Hello, so I just opened up my fuel tank, the passenger side, one, and as soon as I removed the O-ring, a stream gas started coming out from under the car, is this normal?

Hi,

That doesn't sound normal. Was it coming from one of the fuel lines? The O-ring is between the tank and the module. I'm not sure what would cause fuel to start leaking when that is opened unless you pulled the module out and then it started.

In what condition was the O-ring?

Joe

Yes, once I took the o-ring off the pump came off and that’s when gas quickly started coming out from directly underneath. The o-rings condition seems good still.

Hi,

The fuel pump should have lifted first once you removed the retainer. Then the o-ring is between the pump and the tank. Is that how you have it installed or did you place the pump in the tank, the O-ring on top of the pump, and then the retainer? Also, there are notches on the lock ring. Make sure all seven notches of the lock ring have engaged.

Next, I attached the directions for the auxiliary fuel pump module installation. It indicated the o-ring must be replaced. I've never had a problem with one that was in good condition, but maybe that is the case with yours; it's damaged and not visible.

Take a look at the directions below. Make sure everything is clean and confirm the quick connector isn't the source of the leak.

Let me know what you find.

Joe

See pics below.