How do you test the FPR?
Posting Guru
Joined: Jan 2003
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From: Still under the hood in O
How do you test the FPR?
You need a gauge made to hook up to the schrader valve on the fuel rail (looks like a valve stem).
With the motor running, test the pressure then unhook the vacuum line on the FPR and test again.
With the motor running, test the pressure then unhook the vacuum line on the FPR and test again.
Thread Starter
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Tuned
Joined: Jun 2003
Posts: 489
Likes: 1
How do you test the FPR?
Does it matter what speed the engine is at? Like idle vs. revving higher? I'm guessing I should have something around 40psi? What should I look for with the vac hose off?
Thanks for the very helpful info...
Thanks for the very helpful info...
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Tuned
Joined: Jun 2003
Posts: 489
Likes: 1
How do you test the FPR?
naw, I got a rough idle...runs good other than that. The cat was plugged up and I replaced it (both of them with a single). The muffler is showing excessive heat and the exhaust smells overly rich. I think gas is going into the cat and causing problems. Plugs, cap, rotor, wires and coil are new and no change. Changed fuel filter, checked egr, IAC and MAP...can't find any vacuum leak and I pull 19" constant now. I'll check to see if I have an injector stuck open by testing the fuel pressure off the rail and see how long it holds it pressure after it is turned off.
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