Need4Speed0to60

Can anyone help me figure out what happened to my car yesterday? I redline in 3rd on the highway not payin attention, and "bucked" once, the rev limiter drops straight to zero, I can't give it any gas, and when I rolled onto a ramp nearby shut it off, it wouldnt start back up, it would just sputter and die. Rolled it to a empty drive way, tried startin it yet it still wouldnt start up just sputter sputter bleh.......15 minute's later I try once more it STARTS!!! lol what a relief, but could it possible I did some internal damage?
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ninjaN8

i think it must have gone haywire....

Red2.4SS

Could have gone into power reduction mode.

Sometimes the ECM does that. Try and unhook the battery for a few minutes to reset the ECM.

If its running fine now I would assume the engine is fine.

Cobalt_SSTuner

iTrader: (1)

its those damn gremlins

CTSSBowtie

Yeah, the ECU put u in reduced power mode so as not to 'hurt' the engine. It happened to me when i forgot to reconnect an air sensor after an oil change. Its just one of those gay 'safety' systems GM put into the car.

07LaserBlueSS

I could also be the crank position sensor going. I have heard of that problem a few times, and I have bumped my rev limiter a number of times as I autox most every weekend, and never had that problem.

Need4Speed0to60

If it did go into "limp mode" would it not say that on the display?

06YellowSS/SCinSC

I had my CPS go out after I bumped the rev limiter one time. I never saw it say eng pwr red on the DIC but it ran like crap after. Did the same thing as yours- wouldn't crank then finally did after about 10 mins. But mine wouldn't run right after. It was really sluggish.

07LaserBlueSS

Take it to the dealer and have them check the Crank Shaft Position sensor. That should fix your problem.

Need4Speed0to60

Yea I'm goin to the dealership Tues. gotta take off my CAI, I dont think anything else like Corsa exhaust or aftermarket header's would void my warranty right?

07LaserBlueSS

You can leave the CAI on too, they would have to prove that the CAI caused the problem.

Google Magnuson(SP?) Moss Warranty Act

avenger09123

He's right Magnuson Moss Warranty Act in the most common interpretations say they have to prove in writing(in a court of law) how your modification to the car caused that part to fail.

As for your car not restarting right away, every once in a while when I start my car it will start and die because of the temperature overnight and in the morning is at or below 0 in the winter time here. If I turn the key right away it won't restart, I have to let it sit for a minute before restarting it....don't know why....just fyi your not alone

chevy cobalt 08

a lot of times after a stall (when i used to cause i learned manual pretty much on my balt) it didn't like to start some times. some of my friends say the engine was flooded *shrugs*

M-Dub

Nope, you popped a code put it in to Limp Mode.... happend to me too, it's a flaw in the ECU on some models of Cobalt SS/SC's with Intakes you maxed out the Hz frequency in the ECU causing it to kill the motor as to protect it from damage!

It takes it a bit to calm its self down a little, and the restarts and drives like normal... just go get a code reader find out what it is and delete it!

chevy cobalt 08

what exactly is "limp mode?" prob a stupid question...

M-Dub

It is an engine safeway... if you do something dumb or over rev the motor.... anything that the ECU doesn't feel is normal or good for the car it basically shuts it off!

Cuts fuel to the motor, keeping you from destroying the car! Now with 06 SS/SC's with Intakes there is something with the MAF frequency under certain conditions will max it out causing it to think the motor is going 7000 RPMs and freaks it out doing the same thing!

Basically it is just an ECU Engine Safegaurd

chevy cobalt 08

ah ok, thanks for clearing that up.