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 estimated time for replacing a fuel pump
#867933
02/08/08 05:00 PM
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Joined: Jan 2007
Posts: 353
OP
Mudrunner
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got a 97 sahara, i believe the fuel pressure regulator is bad because when its warm it cranks for a while before starting, it does it when its cold sometimes also, ill test the fuel pressure and everything probably tomorrow, but if it is the fuel pump/regulator how much time am i look at for replacing it? ive never droped a fuel tank but my brother has done it several times on his various race cars and he will be helping me
WHEN THE ROAD ENDS, THE FUN BEGINS
97 sahara, 4in skyjacker lift, 33in tires, borla header & catback, 10in subs
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 Re: estimated time for replacing a fuel pump
[Re: playinmud]
#867934
02/08/08 05:13 PM
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Joined: Oct 2003
Posts: 7,768
Web Wheeler
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It may be a simple leak BACK problem.. Try this: When cold turn the key to the "RUN" position to activate the fuel pump.. then after a 10 count turn the key to START.. If it solves the problem you are good to go with no repair. Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />
professional bovine relocation specialist
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Re: estimated time for replacing a fuel pump
[Re: BigJim]
#867935
02/10/08 08:32 PM
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Joined: Jan 2007
Posts: 353
OP
Mudrunner
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i put the guage on and it read 48psi when running (spec is 44-54psi) but after i shut it off i waited 5 minutes and read the guage and it dropped down to 10 psi, i was told this is normal? seems to me like it means the check valve is bad? if thats normal what else would be making it crank longer before starting?
WHEN THE ROAD ENDS, THE FUN BEGINS
97 sahara, 4in skyjacker lift, 33in tires, borla header & catback, 10in subs
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 Re: estimated time for replacing a fuel pump
[Re: BigJim]
#867936
02/23/08 09:42 PM
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Joined: Jun 2006
Posts: 56
Getting the Wheeling Fever
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BJ, could this be the type of system that the pump is triggered only by a cranking signal?
Back in the game!
'94 YJ 2.5 all stock.
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Re: estimated time for replacing a fuel pump
[Re: fresnodb]
#867937
02/23/08 09:50 PM
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Joined: Oct 2003
Posts: 7,768
Web Wheeler
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No...It is also triggered by the run position. Big Jim <img src="/forums/images/graemlins/pfft.gif" alt="" />
professional bovine relocation specialist
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Re: estimated time for replacing a fuel pump
[Re: BigJim]
#867938
02/24/08 10:23 PM
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Joined: Oct 1999
Posts: 2,211
Body Damage is Cool
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It is of course tirggered by both.
The anti drain back valve in the pump is bad. Dropping the tank is related to how full it is. Empty, 1-2 hours on your back, less with a lift and tranny jack.
If full it with fight you the whole way.
SD
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