exauhst manifolds glowing red.but i have no cat

Asked by Mar 23, 2013 at 03:01 PM about the 1994 GMC Suburban K1500 4WD

Question type: Maintenance & Repair

exauhst manifolds glowing red.but i have no cat

5 Answers

107,935

Sounds like high speed, lean operation.

1 people found this helpful.

what is going on with your mixture...timing? late...oh so late ignition...change the fuel on us?

37,085

Roy wtf are you talking about? The only fuel that might cause this is alcohol and it's doubtful he is running that. The timing will make the truck run like crap before it cherries the exhaust and he would be here with that issue instead of the one he has. Tenspeed is spot on.

30

IAC MOTOR /VALVE DEFECTIVE

Exhaust valve leak or running lean, guaranteed

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