Question about 1999 GMC Jimmy

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How to replace spider regulator on a 1999 gmc jimmy

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  • red2525 Apr 23, 2009

    its under the intake



  • yadayada
    yadayada May 11, 2010

    Oh the fuel injector pressure regulator?

  • yadayada
    yadayada May 11, 2010

    what part are u refering to as a "spider regulator" that is a new one to me. Cheers

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  • GMC Master
  • 3,854 Answers

This fuel pressure regulator is a component part of the SFI (sequential fuel injection) assembly, sometimes referred to as "spider". It resides inside of the air intake plenum and is accessed by removing the upper half of the intake. 
Good luck and hope this helps. 
Most of the time when your having problems, it's most likely going to be the whole spider unit. GM has been know to have problems with this type of fuel injection system. 
Check the vacum line to the fuel pressure regulator at the back of the spider housing by the high pressure fuel line. You can see it just in front of the distributor cap and spider assembly.

Posted on Apr 23, 2009

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Posted on Jan 02, 2017

hasbensystem
  • 63 Answers

SOURCE: fuel pressure regulator

How do you know that it is the regulator?
these 4.3 motors had a lot of trouble from 93 to 98, I know I had 2 of them.
What happened to mine was that the intake kept getting very carboned up. After I would clean it, the truck would run fine for about 5 or 6 months, then same thing.
Theres actually a class action lawsuit about this that I believe has been settled, you may have recourse if you bought it through a dealer. Good luck.You'll need it.

Posted on Dec 23, 2008

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How do you know that it is the regulator?
these 4.3 motors had a lot of trouble from 93 to 98, I know I had 2 of them.
What happened to mine was that the intake kept getting very carboned up. After I would clean it, the truck would run fine for about 5 or 6 months, then same thing.
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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

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