2006 cobalt lt2 turns over, wont start - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 2 (permalink) Old 09-12-2018, 12:34 AM Thread Starter
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2006 cobalt lt2 turns over, wont start

Ok so here is the gist of it, my mother had a 2010 cobalt with the 2.2, but somehow something caused the all the rocket arms for the intake valves to shatter. Needless to say she loves the cobalts. So I was able to pick up 2006 cobalt lt2 for $400. 2.2 ecotec. The security light was on and the immobilizer wires were cut. The guy I bought it from from was gonna race it. So i got it home, pulled the immobilizer and ignition from the 2010 and installed it. Did the 30 min relearn and security light went off. But still no dash lights (engine light, seat belt light, abs, etc.)the rest was on. So I pulled the fuse box and found a circuit that had burned in two. I repaired the circuit by soldering a jumper wire. Dash lights all came on. Tried starting, turns over but wont fire. I've since replaced the computer(I had it flashed to my VIN number), ignition control module, the coil, spark plugs, new crankshaft sensor, and replaced coolant sensor. Still turns over but wont start. Also the airbag lights are on, and the information center says service airbag. But using the buttons to the information center they will not return the Info center back to odometer, it will just keep flashing service airbag. I'm at my wits end ready to junk it and tell my mother we gotta find something different. Anyone have any ideas? Is there a list of possible reasons for crank no start or some type of troubleshooting guide?
Benlalden1 is offline  
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post #2 of 2 (permalink) Old 09-15-2018, 05:49 PM
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Sorry for your troubles. I'm not sure anyone is going to be able to assist you on this one though. The Cobalt went through more electronics changes than any other car in just one generation life cycle than any other car that I have had the pleasure of working on. The ECM changed big time in 2007 and went to a more powerful controller. Sorry, but using a 2010 controller in a 2006 is almost like expecting a telegram to communicate with a cell phone. Keep in mind that there are there 3 versions of the 2.2eco in the Cobalt. 05-06, 07-08, 09-10, and they are all significantly different.

Maybe find a 2010 cobalt in a salvage yard for the parts you need.
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