Question about 1996 GMC Yukon
Just tuned up ,& replaced tps & idle air control bad egr or bad map sensor o2 sensor
I had to replace the tube going from my pressure sensor to just under my throttle body and that fixed mine hope it helps
Posted on Jan 04, 2014
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Posted on Jan 02, 2017
Based on what your write up says it would have to be a timing issue or Mass Air flow Sensor (MAF) .If your getting 20 HG's at idle steady there can't be a vacuum leak.Your a little on the rich side so its probably a dirty MAF.Try cleaning it first and see what you get . If that doesn't work then reset timing.
Keep me posted on this .
Posted on May 19, 2010
Sounds like Exhaust gas recirculation valve (EGR) Does it stumble on acceleration
Posted on Jan 17, 2012
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