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Author Topic: 4.2 l with gm 4.3 tbi problems  (Read 757 times)

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Offline becker468

  • Winch Wench
  • Posts: 43
4.2 l with gm 4.3 tbi problems
« on: May 06, 2008, 10:08:14 PM »
I bought a 90 YJ with 4.3 fuel injection put on it, when it is hot it won't start inless you pull one injector wire off, also when you floor it it will bog, any ideas, it doesn't have a pressure shutoff on the fuel pump,maybe this is a problem, I don't know, can anyone help
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Offline Bnine

  • Talks waaay too much!
  • Posts: 2572
  • Sticky Fingers
Re: 4.2 l with gm 4.3 tbi problems
« Reply #1 on: May 07, 2008, 02:52:31 PM »
I would call Howell and talk to them about tuning. You might have the wrong chip in there.

If not, they will walk you through trouble shooting process as well.

Ask them for a copy of their trouble shooting manual for future reference.

They've been helpfull with me in the past trouble shooting issues with their 4.3 system.

hth
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Offline becker468

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  • Posts: 43
Re: 4.2 l with gm 4.3 tbi problems
« Reply #2 on: May 10, 2008, 09:39:10 PM »
Thanks for the reply but it isn't from howell it is actually from a bone yard out of a Chevy, does it matter
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Offline Mudpig97

  • Budget Lift
  • Posts: 157
Re: 4.2 l with gm 4.3 tbi problems
« Reply #3 on: May 11, 2008, 11:50:31 AM »
Check for a bad temp sensor.
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85 CJ7, toy axles and 35's, miller locker in rear.

Offline becker468

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  • Posts: 43
Re: 4.2 l with gm 4.3 tbi problems
« Reply #4 on: May 21, 2008, 02:09:45 PM »
Changed that already,thanks
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