'95 Park Ave... Herky Jerky problem

On the supercharged, I don't know. On the non-super it's at the other end of the fuel rail. There is a vac hose attached. Vac opens the regulator and allows fuel return to the tank. No vac = closed. Pull the hose off, if there is a strong fuel smell in the reg or hose, the reg is bad. With your fuel psi gauge attached there should be an increase in psi with hose off - from 34 to ~50 or so. 34 would be a bit low for a non-super engine. 44 would be better. You will need to look up the specs for your engine - Chiltons, etc. You could check it off the vehicle by pressuring up and seeing when it opens. I have never heard of these people before but the article is worth reading:

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Reply to
=?x-user-defined?Q?=AB?= Paul
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Yes it will. Just not as much as OBDII. OBDI will tell you if its unplugged, and maybe some other stuff. But OBDII will tell you when its not doing what the ECU told it to do. So it would detect sticking. OBDI might, but I am not sure it must.

Your car may have OBDII or may not have either since in 95 I don't think it was required.

Reply to
CL (dnoyeB) Gilbert

Another symptom, perhaps related to the herky-jerky thing. Now, after starting the cold engine the RPM oscillates. It first runs up to a little over

2000, then drops down to below 1000. After repeating this a couple times it settles down to the normal cold idle of about 1100. It began doing this after I had fiddled with it a bit. I took the vacuum line off the pressure regulator to smell it and inspect it. There was a faint odor of gasoline. The line looked ok.

Could this be related to the herky-jerky thing?

TIA

Ed

Reply to
Ed

You might want to try to pull any codes that are set. Check here......

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You may be able to pull some outyourself and track them down. FWIW, my bet goes on TPS.

Reply to
NickySantoro

Probably not at idle. It sounds like several things may need maintenance, fixing, or replacing. Do the usual: check TPS, EGR, IAC, O2, MAF, look for vac leaks, and clean the throttle body.

Reply to
=?x-user-defined?Q?=AB?= Paul

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