: Oops. My car won't start



Unkie Barrels
03-18-09, 05:57 PM
I installed my new W4M PCM but forgot to unplug the battery. Now my car won't start. I unplugged the battery and tried again. Still nothing.

Any clues?

CadiBlk
03-18-09, 05:59 PM
Battery's dead?

blue89bird
03-18-09, 06:00 PM
could have fried the ECM...I've seen it before.

ichpen
03-18-09, 06:04 PM
Hmmm.... Getting electrical power? Is it cranking?

I've done the swap many times with the battery plugged in without issues.

Could be:

a) Bad W4M PCM - swap back to your original, disconnect battery for 30 mins and try again
b) Bad battery - coincidences happen

Unkie Barrels
03-18-09, 06:07 PM
The radio and lights turn on, but nothing happens when I turn the key the rest of the way to start the engine.

I didn't leave the battery unhooked for very long. How long does it take?

JonCR96Z
03-18-09, 06:21 PM
If the PCM was dead it would try to crank but just never fire. Are you saying that you don't getting anything from turning the key to the crank position?

nmaier2201
03-18-09, 07:19 PM
leave the key on for 5-10 mins and make sure the "service theft system" doesn't show up on NAV. The theft system can turn your car into a brick.... have power... but no cranking.

You can short out the starter to see if it turns ( but it will not fire ) that will help you narrow it down.... I wanna say it was a thicker purple wire, but I'd have to check for sure (aka don't go shorting it just on me... verify 1st)

Twitch
03-18-09, 07:24 PM
Try your stock PCM. When I fried mine, car would not crank. Got lights, but she was dead.

easyduzit
03-18-09, 07:27 PM
got too excited to install ? :banghead:

ichpen
03-18-09, 10:19 PM
Swap back the PCM. To be absolutely sure leave the battery disconnected for 30 mins. But yes service theft (engine immobilizer) does sound like another culprit.

liqidvenom
03-18-09, 10:29 PM
You are stepping on the clutch right?

j/k

but if it was a battery issue i think the car would try to tick over, unless you really drained it.