Got more problems, How do you test the FPR?

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Mar 23, 2003 | 01:10 PM

hz900

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Melting Slicks

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From: The Black Hole LA

Got more problems, How do you test the FPR?

Had this happen Friday
http://forums.corvetteforum.com/zerothread?id=519650

Thought I had it fixed because it ran fine all day yesterday. Now it is doing the same thing and all the vacuum lines are hooked up.

So can anybody tell me how to test the fuel pressure regulator?
Could it have messed up something when the vacuum line came off?

Thanks

Mar 23, 2003 | 03:08 PM

sumoboy

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From: Joppa Md

Re: Got more problems, How do you test the FPR? (hz900)

https://www.corvetteforum.com/techti...=192&TopicID=2 :thumbs:

Mar 23, 2003 | 06:14 PM

hz900

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From: The Black Hole LA

Re: Got more problems, How do you test the FPR? (sumoboy)

Thanks for the tip.

It appears that I have a bad FPR. Now my question is if I have a bad vacuum line running to the FPR will it cause the same symptoms. It is odd that it is only doing it from time to time. Is it possible when the FPR goes out that it will work some of the time?

Mar 23, 2003 | 06:53 PM

mr.beachcomber

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From: Roswell Georgia

Re: Got more problems, How do you test the FPR? (hz900)

[QUOTE]It appears that I have a bad FPR. Now my question is if I have a bad vacuum line running to the FPR will it cause the same symptoms./QUOTE]

A loss of vacuum will allow the FPR to run at max pressure all the time since zero vacuum is associated with wide open throttle.

Could you be a little more specific about what your intermittant problems are, or are they the same problems you had in the first thread? That would help in the diagnosis.

Thanks! :seeya

[Modified by mr.beachcomber, 6:58 PM 3/23/2003]

Mar 23, 2003 | 06:56 PM

mn_vette

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From: Jackson MI

Re: Got more problems, How do you test the FPR? (hz900)

When my fpr when out the only symptom that I noticed was the car would crank for about two seconds before it would start.

Mar 23, 2003 | 07:16 PM

hz900

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Melting Slicks

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From: The Black Hole LA

Re: Got more problems, How do you test the FPR? (mr.beachcomber)

Quote:

It appears that I have a bad FPR. Now my question is if I have a bad vacuum line running to the FPR will it cause the same symptoms./QUOTE]

A loss of vacuum will allow the FPR to run at max pressure all the time since zero vacuum is associated with wide open throttle.

Could you be a little more specific about what your intermittant problems are, or are they the same problems you had in the first thread? That would help in the diagnosis.

Thanks! :seeya

[Modified by mr.beachcomber, 6:58 PM 3/23/2003]

I am having the same probs as the first thread. The car died several times over the past week but always started back up. Now it will start sometimes but is running extremely rich and spitting raw fuel out the exhaust. Going to get an FPR right now. Get back later.

Mar 23, 2003 | 10:56 PM

mr.beachcomber

Burning Brakes

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From: Roswell Georgia

Re: Got more problems, How do you test the FPR? (hz900)

Quote:

Since in the original thread you were only smoking and loading up on one side, I would suspect one or more faulty injectors on that side. A new FPR will help keep the fuel pressure below max until WOT, but that would only limit the rate that raw fuel is being leaked into cylinder. You'd still have heavy black smoke and raw fuel dripping out of the exhaust pipe.

Unless someone on the forum knows of another way, the only method I know for detecting a leaky injector is to remove them from the intake manifold and test each one individually to find out which ones are leaking. :(

Mar 24, 2003 | 12:16 PM

hz900

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From: The Black Hole LA

Re: Got more problems, How do you test the FPR? (mr.beachcomber)

The second time it was coming out of both sides, equally, other than that same symptoms. Sorry forgot about that. I bought a rebuild kit for the FPR last night and got most of it back together but it was getting late and I was getting tired of working on it. Should be able to finish getting it together after work.

[Modified by hz900, 11:17 AM 3/24/2003]