Hello Cobaltss comunity, i have a problem with my cobalt SS 06, i went to a mechanic to clean my injectors,TB,change fuel filter and after one day of using the car i start experience an idle problem every time i start the engine, my car revs start going up and down for a few moments until gets normal or i have to press the gas pedal and the revs goes up until it get´s normal revs, i went to another mechanic and the scaner show something about the maf sensor it's not working doesn't show any movement on the scaner they changed the maf sensor but the same problem shows again, i will post a video of this problem.

Tnx for u help

 

Definitely need the maf sensor working properly as it is what measures how much air is coming in. If you replaced the maf sensor and the maf still isn't reading it is either your connection, wires, or less likely ECM.

 

i would make sure the maf is working correctly before proceeding. it could be a number of things causing the hunting idle, the one that sticks out to me is the throttle body being cleaned. these throttle bodies are a little bit fragile, ive heard multiple times where people clean them and start having idle issues. if the blade was pushed open by hand while it was being cleaned id bet on it being the issue. however, before going down that route id make sure there arent any vacuum leaks, specifically around the injector o-rings in the head.

 

Hello, thanks for your answers I appreciate it, I fix the issue in my car and was that I had a burn fuse the emission one, I replaced the fuse and no more idle problems I hope if someone else has this problem check the fuse box and replace the emission fuse.