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Old 02-17-2018, 04:24 PM   #14
Kudzupatch
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Join Date: Apr 2013
Location: GUNTERSVILLE
Posts: 621
Re: 89 C 3500 7.4l TBI with issues

Chevytech helped me with a problem a good while back and after a lot of head scratching and testing I never could find anything wrong.

I finally discovered a lot of my problems were caused by a faulty fuel injector. I was watching the spray from the injectors when I realized that one was spraying a lot more fuel than the other. Replaced them and that fixed my lean condition.
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