Question about 2002 Chevrolet TrailBlazer
Can has a rough idol. but runs normal while in a higher speed
What are the codes coming up. if you have a bad o2 sensor it will come bank 1 or bank 2. there can other things wrong . when was the last tune up. I like would to know what codes please
Posted on Nov 04, 2012
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Posted on Jan 02, 2017
All are possibilities but EGR valve makes the most sense. It's famous for causing poor idling and/or stalling at low RPMS. Best of luck.
Posted on Jun 18, 2009
Are you sure it's bad gas causing the problem? It could be a faulty idle sensor or more than likely the coolant sensor near the thermostat housing malfunctioning. It could be sending the wrong signal to the pcm(power control module) causing the timing to be too far advanced thus causing the low speed chugging & hard starting. Good luck!
Posted on Apr 17, 2010
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