My 2002 Chevy Trailblazer idles rough and is slugish when pulling out. The vehicle runs fine when moving but when I stop at a red light or stop sign it idles rough. I have replaced the crank shaft positioning sensor and the engine coolant tempature sensor and it still idles rough
There are numerous things that can caise a vehicle to idle rough. Could be a throttle posistioning sensor. pcv valve, dirty fuel filter, worn spark plugs and wires, possible O2 sensor. If the vehicle has not had a tune up yet, I would recomend one. Even if it doesn't fix your issue, the vehicle is ten years old and probably needs on anyways. Start there, then rule out the cheaper stuff next. pcv valve and fuel filter, inexpensive and it's probably time anyways. If you are getting an engine code, stop in to advance auto. They'll plug it in for free. If your still having problems, you may have to break down and tajke it to a mechanic to get plugged into a real diagnostics machine.(probably run you around $100)
It could be an o2 sensor. it could also just need a tune up
5,998 views
Usually answered in minutes!
I am having the same exactly problem. I took my truck to two different mechanics and they both said get a tune-up.
First thing I'd ask on this, is this. Was the battery recently unhooked for any reason. If so, easy fix.
×