1995 gmc sierra fuel system not working - Automotive Wiring and Electrical


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1995 gmc sierra fuel system not working

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Auto Repair Home>> Automotive Repair>> Automotive Wiring and Electrical

dpeevy
New User

Mar 16, 2009, 5:44 PM

Post #1 of 4 (2177 views)

1995 gmc sierra fuel system not working	Sign In

Ok I am working on a 1995 gmc sierra 350 , ladies is driving it and she stops at a red light the truck dies and wont start it gets towed to me I have put in a new fuel pump still not starting if i take a hot wire to the battery to the fuel pump relay fuse box it will start but i can't bypas it cause it has to be fixed right . right now when i try to start it with out the jumper wire it cranks and that is it , you can hear the box from the security system clicking also but the fuel system for some reason isnt getting any electricity , unless i use a jumper wire any suggestions as to why its not working ( i have checked every wire ) please let me know or how i can use a jumper wire and get the fuel system to operate with the ignition ( ie the fuel system will turn off and on with the rest of the vehicle ) thank you for reading

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Mar 16, 2009, 6:24 PM

Post #2 of 4 (2171 views)

Re: 1995 gmc sierra fuel system not working	Sign In

A maybe for this:

The oil pressure switch may be able to cancel fuel pump but I thought there was a grace period for start up.

If there's some aftermarket security system in this that failed to cause this good luck!

Wild shot -- relay can't deliver the juice. Can you feel it tick but not allow power thru it? Not the most common on GMs but carry spares for Fords!

T

dpeevy
New User

Mar 16, 2009, 6:44 PM

Post #3 of 4 (2168 views)

Re: 1995 gmc sierra fuel system not working	Sign In

there is an security system but i am not sure if it is after market but i think it is i cant find the oil presure switch i was thinking the security system had something to do with it but dont know how to reset it to check

Loren Champlain Sr
Veteran / Moderator
Loren Champlain Sr profile image

Mar 17, 2009, 10:03 AM

Post #4 of 4 (2157 views)

Re: 1995 gmc sierra fuel system not working	Sign In

Does the ignition key have a little 'chip' in it? Security lamp illuminated on dash? Try another key. Lock and unlock the driver's door with the key, then try starting. Just a guess, or two. Most of the later model GM's have the VAT system. The ignition switch must 'see' the correct resistance in the little chip in the key.
Loren
SW Washington

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