how to diagnose a fuel pressure regulator
04-06-2009, 07:32 PM
#24
shbox site says what fuel pressure should be, might be worth taking a look. I cant really say if the FPR is bad. Since you don't have fuel on the vacuum side.
http://shbox.com/1/4th_gen_tech2.htm...essure_testing
http://shbox.com/1/4th_gen_tech2.htm...essure_testing
04-07-2009, 04:38 PM
#32
04-07-2009, 05:02 PM
#33
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Hi, I have same problem, there is not fuel coming out from FPR , the fuel pressure is 50 psi at idle and 60 psi without vacuum line....no fuel inyectors leaking, so I am 99% sure, my fpr is bad. The idle is a little high and some times I have to turn the key 2-3 times to get it start. My fuel pressure drops almost immediately to 0 psi when engine is not runnig.
What other symptoms do you have?
What other symptoms do you have?
04-07-2009, 09:25 PM
#35
Hi, I have same problem, there is not fuel coming out from FPR , the fuel pressure is 50 psi at idle and 60 psi without vacuum line....no fuel inyectors leaking, so I am 99% sure, my fpr is bad. The idle is a little high and some times I have to turn the key 2-3 times to get it start. My fuel pressure drops almost immediately to 0 psi when engine is not runnig.
What other symptoms do you have?
What other symptoms do you have?
04-24-2009, 06:03 PM
#37
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got the new fpr on...i cant tell yet if it fixed the problem but it actually does seem to be idling lower...ill have to throw a tech II on there to read rpms to see if it helped
04-24-2009, 09:29 PM
#40
With a fuel pressure gauge hooked up and system primed with engine off does the fuel pressure drop to 0 immediately? If so, I would be willing to bet it is the check valve in the pump.
