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Hey guys and gals, Having a problem with my 06 cobalt. The rpm redlines at 4000? it wont go any higher. I'm not sure what would cause this, Any help would be great
 

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Could you be a little more specific? Are you trying to rev more more than 4000 RPMs in neutral? If so, the ECM is going to keep you from over revving the engine...designed that way
 

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I got mine to redline in neutral just look at my tach in my sig
 

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there is no tac in your sig lol and the cluster is so small in your sig you can't tell if its redlined anyways, but the ecu keeps it from redlining in neutral or park, can only be fixed with a tune so unless your tuned its just a flo0k or you thought you were in neutral and wasn't. lol. btw we are talking about automatics here not 5speed not sure which you have. 5 speed you can redline in neutral yes.
 

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your trans could be toast. Then again it could be something completely minor. Something like that its hard to guess over the net, and its not common for these cars.

side note: redline in neutral = boom :-(
 
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