Question about 1991 GMC S-15 Jimmy

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Fuel pump not pumping

1991 gmc jimmy 4.3 engine i can hear fuel running but no fuel coming from line has new fuel filter.

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  • Paul Huckle
    Paul Huckle May 11, 2010

    Hello

    do you mean that you can hear the fuel pump working?

    also did the fuel filter get fitted the right way around?

    regards Paul

    www.limtec.co.uk

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  • 12 Answers

You can Hear fuel running? Where in the tank? If so then it sounds like the fuel pump dettached from the supply line inside the tank.

Posted on Feb 17, 2009

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SOURCE: Replaced fuel pump. It runs

Fuel pump relay inside the glove box is kaputz? http://www.ehow.com/how_5486354_replace-jimmy-fuel-pump-relay.html

Posted on Feb 20, 2011

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Posted on Jan 02, 2017

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1 Answer

Where is the fuel pump relay on a 1991 gmc jimmy


Thye fuelpump relay is located to the right of the brake booster. this is for a 1991 gmc jimmy (s-15)

I have enclosed a diagram to help locate the relay.

The most common reason for no fuel pressure on these trucks is not the relay but rather the fuelpump itself. the pump is located inside the fuel tank.

There is also a problem with the wiring to the fuel pump, you will need to locate the top of the tank and then off to side of tank is wiring .
This wiring comes off the top of the tank, you will need to check and there is connector problems..
there is one or two ground wires that come off wiring to top of tank which run to frame, check to make sure the grounds are good. if you end up with a bad pump you will see a notice to rewire a new fuelpump connector. hope this is helpful. good day.3_4_2012_1_29_16_am.gif

Mar 03, 2012 | 1991 GMC S-15 Jimmy

2 Answers

Put new fuel pump in tank of 1994 Jimmy. I can hear the pump run but fuel is not getting to the injectors. Is there different pumps that came fo rthis vehicle?


did you change feul filter? some of these will install backwards and will have no flow.is there enough feul in tank? did you replace or clean sock at bottom of feul pump

Oct 05, 2010 | 1994 GMC Jimmy

2 Answers

1995 GMC JIMMY WHILE DRIVING ENGINE DIED I HAD TE FP CHANGED FUEL FILTER NEW COMPUTER NEW PLUGS WIRE D CAP COIL AT THIS TIME NO GAS NO START


CHECK TO SEE IF FUEL PUMP IS CYCLING WHEN YOU TURN KEY ON, SHOULD HEAR BUZZING NOISE FOR 5 TO 10 SECONDS,IF NOT FUEL PUMP IS FAILING.

Feb 02, 2010 | 1995 GMC Jimmy

1 Answer

Have installed new fuel pump and gas lines in 1995


pull line off of front of filter and cycle key 2 on position if there is no fuel present your feul pump may b the problem, before replacing old one make sure the fuse is good

Oct 06, 2009 | 1995 GMC Jimmy

1 Answer

1991 gmc jimmy over fueling at start up, it wont start unless you push the gas pedal then it runs rough if you let off it stalls. It is getting way to much fuel...


Sounds like the relay is not shutting off fuel pump. Turn the key to on position ( not start ), pump should only run for a few secounds and you will hear a click and pump should shut off, if it keeps running relay is bad. If it works like it should than fuel regulator (if there is one) would be the next posability.

Apr 08, 2009 | 1991 GMC S-15 Jimmy

1 Answer

I can hear the fuel pump working but no fuel coming from line


id say the fuel pump isnt working as it sounds...id replace the fuel pump

Jan 11, 2009 | 1991 GMC S-15 Jimmy

1 Answer

LOW VOLTAGE ON A FEW WIRES WILL NOT RUN


Many wires on most autos will have low voltage around 5 volts is common for wires going to most sensors. What you described with the fuel pump sounds normal for this truck. I would guess the fuel pump is not your problem cant say for shore with out any more info. I am unclear as to what the symptoms are, is the truck not starting. What led you to check the fuel pump. Did you check for spark.

Jan 10, 2009 | 1991 GMC S-15 Jimmy

2 Answers

JUST DONT WANT TO RUN


Check the fuel pump.

Jan 09, 2009 | 1991 GMC S-15 Jimmy

1 Answer

FUEL PUMP DRAINING FUEL BACK INTO TANK WHEN ENGINE IS SHUT OFF


The fuel is in a continous loop being available at  all times to the TBFI. It has the return path so it can always return to the tank via the return line. Np check valve as the pump runs all the time.

Jan 07, 2009 | 1991 GMC S-15 Jimmy

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