I was on the way home from work yesterday and stopped a light. When light turned green, I noticed the car wasn't running (had radio on and was checking emails at the light so didn't notice it shut off). The car would not restart. It felt as if the batter was low. It would turn over but not fast enough to start the car. I had someone push me and it started but died immediately when I let it idle and would not start again. Couldn't push start it or jump start it after that. I ended up trailering it home.

Its a MY03 with AEM V2.

I have had the battery and alternator tested and both are fine.

I did notice that there was a small amount of coolant coming out of the rear IAC hose.

Does anyone have any ideas and where to check next? I was thinking of installing my stock ecu and seeing what happens and seeing if it may throw a code.

The car was running great until the moment it died.

Thanks in advance.

 

***Update***

I charged the battery over night and cleaned the IAC (wasn't dirty). Car started after a few cranks and ran good. Idle would drop and almost stall but it would catch itself and run fine.

Shut the car off.... Wouldn't start again. I can only get the car to start on a fresh charged battery or with the battery charger hooked up on jump start mode.

Battery tests fine. 548cca and 12.95 volts.

I'm at a loss.

 

***Update 2***

Car starts right away on stock ecu.

Help!

 

Sounds like you need AEM to repair your ecu.

 

Checked resistance on cam and crank sensors- Those check out fine.
Uploaded new basemap- Still can't get stat sync

Called AEM last week and they think it could be a problem with the cam and crank sensors not sending enough voltage and that the stock ECU isn't as sensitive so it might not be catching the issues there.

I can't figure out how it would just crap out out of nowhere and not work at all.

I'm leaning on what Ian300D said and have emailed AEM. I will wait to hear back from them, but I wanted to make sure I wasn't chasing the wrong problem.

Thanks everyone.

 

****SOLVED****

AEM determined that I was not getting a signal from the cam sensor and recommended I change the sensitivity perimeter from 0.00 to 0.02. That solved it. Fired right up.

Still not sure why this would have caused the car to stall but I don't know anything about engine management.