Question about 1991 GMC S-15 Jimmy

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1994 jimmy fuel shutown @spider?

What can I dow?

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  • johnl602 Jun 18, 2008

    thank you for answering my question geordie...but we have checked all that and it is still not working...how much psi's should the pump be pumping out? do you know how to turn the spider on? and will the fuel pump do it itself??? i appreciate your trying to help and if you could answer these im sure they would be alot more helpful...thank you so much...



    John L

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2 Answers

Where is the spider and fuel pump relay located on 1991 gmc jimmy 4x4

Posted on Jun 29, 2008

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Hi

A very common failure on these is the CPFI unit , or SPIDER as people like to call it.

There is one single injector which feeds each cylinder via a pipe and poppet. The injector becomes blocked and the engine won't start or run.

Before you go condemning this though, just make sure you have good fuel pressure because the fuel pressure regulator or fuel pump could also have a hand in the problem. Make sure the pump is running, and if not then check the fuse, the relay, and the pump itself.

Very best regards

Geordie

Posted on Jun 18, 2008

  • Steve Adams Jun 18, 2008

    If you check the fuel pressure you need at least 56 psi if I'm not mistaken or you will encounter problems.



    Geordie

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