Question about 1998 GMC Jimmy
I would start with the Mass Airflow and EGR sensors first, because they can cause the misfire codes and the intake pressure and temp. Just because the air filter and hoses are clean and free flowing doesnt mean the computer can see that. If your Mass Airflow sensor died, as far as the computer is concerned, there is no air going into the engine.
Posted on Jul 28, 2009
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Posted on Jan 02, 2017
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