Question about 1998 GMC Sierra

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Red hot exhaust manifods

What can i do when my exhaust manifolds are getting red hot just from going a couple of blocks?

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Make sure that your catalytic converter and exhaust is not plugged..Also check for propper map sensor operation,the reading that the map sensor supplies to the pcm is used to adjust ignition timing and fuel delivery.If the timing is being retarded to far , the exhaust exiting the cylinders will be extremly hot and will produce the effect you are having...Good Luck...

Posted on Sep 19, 2008

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