Fuel pressure...

[jdenning002]

I am having some trouble with my car running a little rough...

I have been hunting for the problem.

I suspect either COPs or the fuel pump...

I am wondering what the normal fuel pressure is at idle and WOT.

Also, is there any way that I can test my pump?

I have a scan gauge and all of the sudden I cannot monitor fuel pressure on it, the option shows but no reading.. Anyone know why?

Any help is greatly appreciated!

[juno]

Your FP sensor may be bad. That could cause a problem with it running rough as it tells the fuel pump what to regulate at.
Unplug it and see if it makes a difference in the way it runs.

Normal fuel pressure should be about 39 psig. That means about 35-45 psi above whatever your manifold pressure is.

IIRC someone had a bad one recently.

[jdenning002]

Your FP sensor may be bad. That could cause a problem with it running rough as it tells the fuel pump what to regulate at.
Unplug it and see if it makes a difference in the way it runs.

Normal fuel pressure should be about 39 psig. That means about 35-45 psi above whatever your manifold pressure is.

IIRC someone had a bad one recently.

Thanks for the tip, I will see if I can get my hands on one to replace...

I unplugged it yeterday at idle and there was no difference.

Any way to test the pump?

[juno]

Without a gage or a way to read fuel pressure you would have to use a troubleshooting procedure from the shop manual. I do not know if they have one for the fuel pump, but they might.