Hello I have a 2005 cobalt ss supercharged stage 3 water meth, the CEL never came on, but the car died out. It has spark, great compression and I changed every sensor on it but when I go to start it, it fires up then dies right out, I am wondering if it's something like security or what the problem is it seems electrical, and it's weird that it didn't ever throw a code anyone have this issue? Or can help?

 

Unplug the mass air flow sensor and see if it'll run

 

It has a brand new MAF sensor, but I guess brand new doesn't always mean not defective. I will definitely try it as soon as I get home, thank you! I'll let you know if it runs or not

 

Security light on?

 

Now that you mention it I think I did see the security light on

 

Well that could explain it

 

How would I get security lock off?

 

try unhooking the battery for 10 minutes... hooking it back up and trying it.

 

Start and die is almost always the security system, it will allow it to run for about two seconds then kill everything if the wrong key is used.

Do you possibly have another key that works?

 

The battery was dead for awhile so it hasn't has power till today when I charged it, and no I only have the 1 key and key fob

 

Unfortunately I just came in from looking at it, the security light isn't on, so it has to be something more then that, like the car I turn it over it starts then dies within 12 sec no check engine light ever came on I'm lost. The mods are flashed and tuned ecu, water meth, typhoon k&n intake and other mods internally I have no clue what could cause this to happen, car ran great then shut off 1 day, changed basically every sensor, hooked up to 2 different readers and absolutely no codes popped up

 

Fuel pump dying?