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Old 05-27-2009, 09:47 PM   #5 (permalink)
octaneman
Mentor Home Support, Gearhead Automotive Center
 
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Re: 1988 chevy 4.3 smell rich runs lean

So far everything checks out, but the computer temp sensor is not being ruled out just yet. Check the catalytic converter for blockage including the rear muffler see if there is reasonable back pressure coming out of the exhaust. If the exhaust is blocked, isolate the catalytic converter and work your way to the muffler.

post back your findings.
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