1995 Buick Regal fuel pump issue

Tiny
DGRAVEN1
  • MEMBER
  • 1995 BUICK REGAL
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 195,000 MILES
I replaced the fuel pump on this vehicle and ir ran fine shut it off and it blew the 20 amp fuse I replaced the fuse with a breaker and it started a few starts later it did it again I removed the tank and ohmed out the wiring no short to ground My question is could the oil pressure cut out switch cause this issue
Sunday, December 14th, 2008 AT 10:32 PM

5 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Not sure oil switch would be at fault if it was then fuse would blow the as so as key it turned. Ie. Direct short in switch. Pump maybe drawing to many amps. Pull fuse put amp meter across fuse terms. Pon high scale start up observe amps if close to 20 or over motor is fault.
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Monday, December 15th, 2008 AT 8:38 AM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Was it blowing the fuse before you replaced the pump?

Are you saying the fuse blew after you turned the key off?

Did you try running the pump through the prime connector?
You could unplug the oil pressure switch and see if the fuse still blows.
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Monday, December 15th, 2008 AT 8:48 AM
Tiny
DGRAVEN1
  • MEMBER
  • 2 POSTS
I checked the amp draw close to 13 amps I installed a circuit breaker in place of the fuse it trips first start up in AM turn off key and breaker resets and the car runs all day even with multiple starts I would think if it's a shorted wire it would come back wile driveing not so Is their a fuel pump timer or relay for start up 2w3hen you key it up the pump runs 3-4 seconds and shuts down on crank it starts and runs Yes the fuse was blowing before the pump was changed I removed the pump and connected to a battery it ran for 10 seconds slowed then stopped
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Tuesday, December 16th, 2008 AT 8:31 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
So the pump prims then you go to start fuse blows. Then turn off wait for breaker to reset then it runs rest of day. Right?
Need to know
3.1 or 3.8
Location and ID of fuse blowing
Antitheft?
Production date or VIN
Any info as to repairs prior to incident
When did fuse start blowing that prompted replacement
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Wednesday, December 17th, 2008 AT 8:21 AM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
The info I have on the 3.1 and 3.8 shows the same fuse for the load side of the pump relay, ecm bat fuse 20 amp.

He could use the prime connector, to separate the pump from the ecm on the load circuit. Check amp draw just for the pump. Use an inline fuse on the jumper.

I just wanted to add, that fuse is not a dedicated fuel pump fuse, it also supplies voltage to the computer.

I don't know how you checked amp draw on that circuit, you need to separate the pump circuit from the ecm/pcm circuit, to check the amp draw for the pump. You could do that using the prime connector and an inline fuse on the jumper.
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Wednesday, December 17th, 2008 AT 9:42 AM

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