Fuel Pump NOT shutting off.
Thread Starter
Joined: Jul 1999
Posts: 12,088
Likes: 125
From: SALEM, NH
Car: '88 Formula
Engine: LC9
Transmission: 4L60E
Axle/Gears: 3.89 9"
Fuel Pump NOT shutting off.
Anyone experience a condition when their fuel pump would not turn off while the car was not running? I.e, ignition on but not started yet. usually it pulses for a few seconds and kicks off, but I noticed today that it is
staying on.
I'm not sure if it has something to do with my MSD 6al, my adjustable fuel pressure regulator, or an electrical problem somewhere else.
-- Joe
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1989 Formula 350 4-bolt mains, Forged .030 TRW pistons, SLP 51010 Roller Cam, Comp-cams roller lifters,
Summit 1.5 roller rockers, World Products Sportsman II 2.02/1.60 heads, Edelbrock TPI Intake,
Cloyes Double Roller timing chain, Mellings oil pump: 13.5 @ 100.23 MPH
Since close of track : Ported SLP runners, Ported Plenum, AFPR, Autometer 100lbs F/P gauge, A/F ratio gauge, MSD 6AL, MSD Redline selector.
http://www.joesperformance.com
staying on.
I'm not sure if it has something to do with my MSD 6al, my adjustable fuel pressure regulator, or an electrical problem somewhere else.
-- Joe
------------------
/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
1989 Formula 350 4-bolt mains, Forged .030 TRW pistons, SLP 51010 Roller Cam, Comp-cams roller lifters,
Summit 1.5 roller rockers, World Products Sportsman II 2.02/1.60 heads, Edelbrock TPI Intake,
Cloyes Double Roller timing chain, Mellings oil pump: 13.5 @ 100.23 MPH
Since close of track : Ported SLP runners, Ported Plenum, AFPR, Autometer 100lbs F/P gauge, A/F ratio gauge, MSD 6AL, MSD Redline selector.
http://www.joesperformance.com
Member
Joined: Aug 2001
Posts: 102
Likes: 0
From: Sydney,NSW,Australia
yes that was only after i replaced the fuel pump relay connector because it had deteriated and i soldered on the new connector but made the mistake of connecting the red wire instead of leaving it disconnected that made the fuel pump to be constantly in prime pump mode i think the red wire is to test the fuel pump try pulling out the red wire terminal on the fuel pump relay connector then connect the relay and see if it works because for me it did.
TGO Supporter
Joined: Jul 2001
Posts: 404
Likes: 1
From: Evansville, IN USA
Car: '89 GMC Pickup
Engine: 383 SBC Stealth Ram
Transmission: 700R4/VIG 3200
<font face="Verdana, Arial" size="2">Originally posted by anesthes:
Anyone experience a condition when their fuel pump would not turn off while the car was not running? -- Joe
</font>
Anyone experience a condition when their fuel pump would not turn off while the car was not running? -- Joe
</font>
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SMasterson
Supreme Member
Joined: Jul 1999
Posts: 2,767
Likes: 2
From: Vereinigten Staaten
Car: Take
Engine: Your
Transmission: Pick
It could be that the contacts in the fuel pump relay, or the oil pressure switch are sticking. If it only happens w/ the key on, it may be a shorted driver in the ECM, or the MSD may be fooling the ECM that the car is running. Try unplugging the MSD, and if no change, try unplugging the ECM.
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