Question about Chevrolet TrailBlazer EXT
After sitting awhile the motor idles rough at startup - once it's warmed up it runs ok
Posted by Anonymous on
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Posted on Jan 02, 2017
There are 3 things that cause an engine to run hot;
1) Lack of coolant
A) Broken fan belt
B) Any obstruction to air flow, rags in the fan or vents
2) Ignition timing too far advanced
3) Too lean a fuel mixture.
Posted on Oct 13, 2008
There are 2 common problems on this concern. 1st maybe a dirty MAF sensor. Remove the MAF sensor and clean it with a good electrical cleaner and air dry or light shop air,then reinstall and do a couple of wide open throttle burst to reset it.
2nd problem and we see alot of this is the orings between the upper and lower intake manifold leaks.You would have to remove the upper intake manifold and replace them.
Posted on Jan 29, 2009
what codes are present? If it is lean codes P0171/P0174 problem is most likely the orings leaking between upper and lower intake manifold if this is a 4.0L
Posted on Feb 11, 2009
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