I have a 2006 Chevy Cobalt and I have read several posts that sound like the problem I am having. My car runs fine then the engine will start surging--the RPM guage will swing wildly from 500-2000 while driving. This started this past winter and seemed to occur when the temperature was below freezing. When we would stop, the car would die but would restart instantly. It would just stop acting up after about 10-15 minutes. Now, the weather is hot, and the engine surges at times, especially when the AC is on high--I turn the blower down and that seems to ease up on the problem but doesn't totally stop it. But if I am driving slow-less than 30--the car will just suddenly die for no reason and without any warning. Also, the AC will blow cold then will blow warmer air. My husband has a code scanner and it didn't show anything.

A nice simple answer, you can't. Think of it this way, the car doesn't know you are the owner, and it is there to stop exactly what you are trying to do. You have two computer ECM and BCM, plus the antitheft module and a number of sensors all trying to stop you. All you have to do is the re-learn procedure. Plan B is an auto electrician or alarm / radio installer or auto locksmith.

30 Minute Re-Learn Procedure

1. Turn ON the ignition, with the engine OFF.
2. Attempt to start the engine, then release the key to ON (vehicle will not start).
3. Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF.
4. Turn OFF the ignition, and wait 5 seconds .

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Nov 11, 2011

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Really need to know what? That search his normally the torque that the engine produces on the road.

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First step is to get the computer codes read. Your local auto parts dealer may read the codes for you at no cost. Once we have the codes, we can advise you further.

I would recommend cleaning the throttle body with carburetor cleaner, remove the air inlet to the throttle body and try cleaning. After cleaning will be hard to start but should solve your issue

could be, but check starter relay in under hood fuse block contacts may be sticking or ign switch

If you need further help, I’m available over the phone at https://www.6ya.com/expert/mike_9693b5ad75773352

Your local auto parts store will read them for free, give you a print-out (sometimes) and recommend some popular fixes. Try Auto Zone, or call your local parts outlet.

There are several bulletins GM has put out about the steering on those cars.

You're hydrolocked. Pull the sparkplugs out and crank the engine for 30-60 secs. there is a VERY GOOD CHANCE you could have done some major internal damage. Be prepared to replace your engine, but this might work.

The main problem could be a well known cobalt ignition issue. check all fuses, wires, and connections if you've worked on cars before and call to see if you still have any warranty left. This should be handled by a chevy dealer or chevy trained mechanic...to isolate the issue fast and avoid repeat visits to get er done.