1991 s10 pickup fuel pump shutting off intermediate some times not at all.

10

Asked by Feb 20, 2016 at 07:03 PM about the 1991 Chevrolet S-10

Question type: Maintenance & Repair

I have replaced the fuel pump, the screen, the fuel filter, rebuilt the fuel
pressure switch, and changed the two relays under the hood. When turning
the key forward to start the engine, the pump kicks on and shuts off just like it
should. Turn the engine off and that is when I have the problem. Will actually
kick off for a split second, then kick back on.

6 Answers

69,715

So it's like it is getting power after you turn the key off?

10

yes it should run for a few seconds when you turn it off but it just keeps running

69,715

Chances are it would be in the ignition switch. Thats what kills all the power.

10

The pump still has to pressurize after the key is turned off. Is there a sensor that senses when the system is pressurized and cuts power to the pump?

69,715

I found a fuel pump cut off switch that they say is on your truck. I wouldn't know where it is, but if you ask at the parts store, they may be able to tell you. Also found that there is a fuel pump relay that would make sense to try.

10

This is an update, the problem has been solved. It was the oil pressure switch. It was showing oil pressure after the motor was shut off so it was sending the message to the computer that it had oil pressure meaning that the motor was running so the fuel pump would not shut off. This is a new one on me, but thanks everyone for all of your help.

Your Answer

Add photo

Related Questions

  • why won't my chevy s10 4.3 v6 start after running it a while 20 answers

    After running my truck for awhile I shut it off and then have to wait for sometimes over an hour for it to start again I have changed the coil pickup and put ne distributor cap and rotor on it

    1991 Chevrolet S-10

    -

    Maintenance & Repair

  • Chevy S10 1991 4.3 click crank? 1 answer

    My 1991 4.3L S10 previously did crank and not start. Now it does not want to crank. All it does is make a single click and everything shuts down. Changed the fuel filter, fuel pump assembly, and f...

    1991 Chevrolet S-10 STD Extended Cab SB

    -

    Maintenance & Repair

  • 86 s10 no pwr to fuel pump 7 answers

    Someone bypassed the relay on my 86 s10 . Was driving and it just shut off. Now I'm not getting pwr to the pump at all and can't figure out why. Help please

    1986 Chevrolet S-10

    -

    Maintenance & Repair

  • s10 v6 cranking, firing and has spark but will not start? what could it be 19 answers

    s10 v6 cranking, firing and has spark, also hear fuel pump at gas tank but will not start what could it be?

    2002 Chevrolet S-10 2 Dr LS Standard Cab LB

    -

    Maintenance & Repair

  • 1991 toyota pickup, 22RE strugging for fuel/no power. Timing Chain? 3 answers

    My 1991 Toyota pickup, had the head gasket blow out an replaced it last year, about 5 months later the truck would cut off on me and not start again, acted like it had ran out of gas. over the last 6 ...

    1991 Toyota Pickup 2 Dr Deluxe 4WD Standard Cab SB

    -

    Maintenance & Repair

S-10

Looking for a Used S-10 in your area?

CarGurus has 1,345 nationwide S-10 listings starting at $1,395.

ZIP:

Search Chevrolet S-10 Questions

Chevrolet S-10 Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 2,300
#2 John Saffrahn
John Saffrahn
Reputation 970
#3 Trebor66
Trebor66
Reputation 960
View All

Related Models For Sale

Used Ford Ranger
196 Great Deals out of 5,805 listings starting at $1,650
Used GMC Sonoma
5 Great Deals out of 469 listings starting at $2,500
Used Ford F-150
2,194 Great Deals out of 206,316 listings starting at $1,499
Used Dodge Dakota
106 Great Deals out of 3,781 listings starting at $1,680
Used GMC Sierra 1500
819 Great Deals out of 68,199 listings starting at $2,484
Used Chevrolet Blazer
4 Great Deals out of 1,167 listings starting at $1,255
Used Chevrolet C/K 1500
892 listings starting at $2,500
Used Chevrolet Camaro
226 Great Deals out of 30,943 listings starting at $1,217
Used Ford Mustang
470 Great Deals out of 45,735 listings starting at $1,999

Used Cars For Sale

2004 Chevrolet S-10 For Sale
65 listings starting at $2,695
2003 Chevrolet S-10 For Sale
6 Great Deals out of 337 listings starting at $2,300
2002 Chevrolet S-10 For Sale
3 Great Deals out of 207 listings starting at $1,395
2000 Chevrolet S-10 For Sale
191 listings starting at $1,600

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.