No fuel pressure

89roadster · Nov 10, 2004

It's taking a while to start the engine once it's been off for a while (3-4 seconds of holding the key to ignition). If I disconnect the fuel lines at the rails with the engine cool, no gas comes spueing out (there's no pressure).

Any ideas of where to start looking for problems?

EDIT: I've run the codes and the only problems I'm getting back are EGR failure, I don't believe this has anything to do with it???

Rick 91GT · Nov 10, 2004

You may not get a lot of gas out of the lines when it has been sitting, the pressure will bleed back.

If you want to make sure you have fuel coming to the rails, you can hook up a manual gauge at the shrader or pop off the feed line, put it in a container and turn the key to prime the car it should come out with a lot of force.

89roadster · Nov 10, 2004

Rick 91GT said:
You may not get a lot of gas out of the lines when it has been sitting, the pressure will bleed back.

It's only maybe a half hour after it's been run...I do need to check the FP when primed though.

jerry beach · Nov 10, 2004

Try this, turn the key to on and dont try to start it. Do this several times, it will prime the fuel system. Then start it on the 5th time.

You should get a FP guage. They are about $20.

I recommend the Charles Probst book, it can be found at amazon, summit, many places. You shouldnt work on these cars without it, or a similar resource. It details a fuel volume test as well as testing for pressure.

89roadster · Nov 10, 2004

jerry beach said:
Try this, turn the key to on and dont try to start it. Do this several times, it will prime the fuel system. Then start it on the 5th time.

You should get a FP guage. They are about $20.

I recommend the Charles Probst book, it can be found at amazon, summit, many places. You shouldnt work on these cars without it, or a similar resource. It details a fuel volume test as well as testing for pressure.

I will try that. I actually do have a FP guage, it's just in storage while I have a garage built...and I have no idea where in the pile of boxes it might be...hate to waste another $20...but I might have to.

HISSIN50 · Nov 10, 2004

after doing what others suggested, might:

carefully crimp the return line to narrow down whether the FPR or pump is at fault.

good luck.

89roadster · Nov 11, 2004

HISSIN50 said:
after doing what others suggested, might:

carefully crimp the return line to narrow down whether the FPR or pump is at fault.

good luck.

I haven't tried any of the suggestions yet (worked late last night), but how does crimping the return line tell me whether its the FPR or pump?

Rick 91GT · Nov 11, 2004

The regulater backs pressure up on the return line, so it you gently clamp the return line you can make sure it holds pressure.

All aftermarket AFPR will bleed down fairly rapidly.

No fuel pressure

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