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#1
12-07-2008, 05:28 PM
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Fuel pump runs 5-9 secs after I turn off car.
Hello,
I have a 1991 Oldsmobile Cutlass Supreme. I wanted to run my situation past you all and see what you think. My fuel pump consistently runs somewhere between 5-9 seconds after I turn the car off. Is this normal, and if not, do you have any advice? (Just a note, the fuel filter is new.) Thanks! -Randy Last edited by randini667; 12-07-2008 at 05:34 PM. Reason: Typo 
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#2
12-07-2008, 06:08 PM
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Re: Fuel pump runs 5-9 secs after I turn off car.
Yes it is normal- but usually only 3 or 4 seconds- it is the residual oil pressure that has to disapate to below 4 psi to disable the oiil pressure switch that is in parallel to the fuel pump relay. Your oil may be thicker than most, or some other reason.
__________________
Automotive A/C Engineer with: '99 IH 4700 Toy Hauler (2) '95 GEO Prizms both maroon '99 GMC Yukon '95 Chev 3500, 454 Dually Crew Cab- 145k miles- Wife's Camel trailer puller. '94 Astro- 370k miles '94 Firebird Formula- 5.7L 180k miles- gone- '92 Chevy Lumina Van 3.8L 264k '86 GMC S-15 - 2.8L 154k '87 Buick Park Ave . 187k '86 Buick Park Ave 3.8L 199k miles- gone '77 Chevy Vega- 2.5L 175k miles gone but not forgotten '68 Camaro 396 4 spd RS/SS -72k miles-
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#3
12-08-2008, 06:56 PM
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Re: Fuel pump runs 5-9 secs after I turn off car.
Quote:
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#4
12-29-2008, 10:21 PM
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Re: Fuel pump runs 5-9 secs after I turn off car.
I don't follow, cutlass supreme a piece of crap?
I noticed that the fuel pump does run for a couple of seconds, the sound that I'm noticing is the hydraulic brake pump motor. Thanks for the info. -Randy
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