fuel pump won't turn off
fuel pump won't turn off
engine is hard to start cranks for 5-10 seconds when cold, it just started doing that yesterday. fuel pump wont turn off even after the key is removed from ignition fuel preasure is normal, going into the throttle body, and out of the return. the car runs fine after it starts. if anyone has any ideas please help.
TGO Supporter
Joined: Sep 2003
Posts: 6,127
Likes: 11
From: conway, s.c.
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 700R4
replace the fuel pump relay, it's taking a long time to operate because it is falling back on the fuel pump/oil pressure sending switch to operate the pump after oil pressure builds up to about 4 PSI.
Supreme Member
Joined: Aug 2004
Posts: 4,168
Likes: 3
From: Marietta, GA
Car: '91 Firebird Convertible
Engine: 305 TBI (LO3)
Transmission: 700r4, Vette Servo
Axle/Gears: 3.27 9 Bolt, PBR disks
Originally posted by Trickster
replace the fuel pump relay, it's taking a long time to operate because it is falling back on the fuel pump/oil pressure sending switch to operate the pump after oil pressure builds up to about 4 PSI.
replace the fuel pump relay, it's taking a long time to operate because it is falling back on the fuel pump/oil pressure sending switch to operate the pump after oil pressure builds up to about 4 PSI.
replaced the fuel pump relay, the old one was hissing. but to my suprise same problem no change. any other ideas, it's not the relay, oil pres. switch, fp fuse, what else could it be?
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