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#1
10-18-2007, 07:01 PM
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00 Cranks ok hard start cold
I have 59 psi on the fuel pump when cranking then 50 when running. But runs bad for the first 1/2 mile then fine after that. New a/c plugs, wires, and fuel filter. No codes. Acts like lean. Had new FPR and PUMP a couple years ago. No fuel leaking by the vacuum port on the FPR. Is this another bad Fuel Pressure Regulator? 100k 5.3 4x4
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#3
10-18-2007, 08:13 PM
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Re: 00 Cranks ok hard start cold
The FPR you bought. is it OEM or Aftermarket? if it is after market it maybe why you are having issues.
__________________
  2000 Silverado Z71, 5.3L, K&N GenII Air Intake, Y-pipe Exhaust (no muffler), Bosch Platnium +4 plugs, 242k miles and still running.
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#4
10-18-2007, 08:36 PM
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Re: 00 Cranks ok hard start cold
FPR was changed two years ago under warranty. I put only AC Delco parts on this.
__________________
1967 cougar 390 FE in progress 1993 F350 Crew Cab 5.8 111K 1983 Coachman 23ft class C 460 1988 Bronco 351 C6 1964 Galaxie 428 4sp project 1995 Mustang 3.8 Auto 1966 Mustang Fast back Project 1994 Tracer Trio 1.9 1968 F250 Camper Special 390
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#5
10-18-2007, 08:52 PM
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Re: 00 Cranks ok hard start cold
Check the value the temp sensor is reporting to the PCM. Another possiblity is a small leak at the intake manifold gasket. Leak goes away after it expands slightly.
Sounds more like a bad temp sensor to me. //2000CAYukon
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#7
10-19-2007, 07:29 PM
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Re: 00 Cranks ok hard start cold
New FPR from delco no difference. Spec according to dealer is 55-60 and I have that and it does not bleed donwn and it does not take but a second to build pressure.
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