More likely than the tune going bad...

 

neh i flashed like other 4 tunes that worked fine with no probs for days and nada......

 

revert back to an older tune and see what happens

 

did so. like 4 of them lol.

 

i really dont know man, can you get your hands on a buddies ecm of the same year you already have unlocked?

 

idk. i dont think anyone has 07 lol most are 06. yeah **** my luck right?

 

Bummer man! I'm HPtooned & I have an '07, but I'm in NY. Hope you figure it out. No one likes to hear about a Cobalt that doesn't start.

 

yeh i guess ill try to get an ecu

 

hmm yeah sounds like you might have a fried ecm

 

Anything Ben can do?

 

idk not much he can do that i can think of lol

 

Idk. Just throwing out ideas.

 

yeh I know lol . ima see if he can find a spare one at the dealer or sumthing idk

 

i cant believe no one knows its the theft system. if you turn the key over and the engine dont crank,more than likely its in your key or pass lock sensor.is your security light flashing? and also if you jump across the starter it will start and die because the pcm thinks the car is being tampered with and cuts off fuel and spark.

 

If you think about it the clue is that you can jump it and it runs. check the main power cables from the starter to the postive post of the fuse box. If that bolt is loose at all you will get exactly what you describe. The other thing that can bite you are grounds again a big ground next to the starter under the oil pressure switch and oil cooler... tite tite tite

 

i didnt see this part, whoops your pcm is on the fritz, try un plugging it for a minuet, plug it back in and reprogram. you probly got it all locked up with all the constant flashing.

 

no theft light on or anything.

 

i thought he said it starts and dies, if thats the case that is what it is designed to do when you bypass the ignition switch.

if no theft light, or security dtc set in pcm and bcm, than your going to need a pcm

 

yah starts and dies. but no theft light off or anything so i think its the ecu. because its keeps saying low fuel. power steering the same way it does when ur uploading a tune but im not..

 

i am a gm tech and the first rule when programming is put a batt. charger on it. i have fried pcm.s in the past due to low voltage while programming, you should keep batt voltage around 12.6. maybe this happend to you? maybe not?

 

i thinks thats what happened. cuz i took the batt to get checked and all and it needed charging. and before this all happened i was uploading a tune so i think thats what happened

 

qft........

 

at least its easy to change, i like those i charge 1.0 to replace and .5 to program customer pay of course LOL

 

are 07 and 06 ecus compatible or no? let me know since i need to find one now lol

 

as far as i know, however they are vin specific. but with hp tuners i guess you can get around it, i am not familier with hp tuners.if you by a new one the 06 and 07 should be identical