MY CAR WON'T START, PLEASE HELP!!!

[niminum]

I just finished installing my new Accufab upper intake plenum/throttlebody combo on my 2000 GT and now my car wont even crank. before the installation i disconnected the negative on the battery and when i try to start it my theft light flashes. i have the factory anti-theft alarm, could somebody please please help i'm desperate to get it started before i have to go to work. and advice is greatly appreciated

 

[Airbeast]

Is the battery cable the only thing you disconnected? Did you disconnect the big wiring harness connector? Also, I had ended up with water in my ECU connector(inside the car) I was causing all sorts of craziness including the theft light and no starting.

 

[98E9GT]

What about disconnecting the battery neg terminal for 15 minutes and put it back on and see what happens. Helped me out.

 

[2000fordstanggt]

better yet, take them both off and touch the pos and neg together to discharge anything left in the system.

 

[2002GreyGT]

Try a differnet key, maybe the ECM lost the info on the key you are using since they have the chips in them...

~K

 

[Rusty67]

Are you the first owner of the car ? If not are you 100% sure there wasn't a dealer installed aftermarket alarm in your car ? Some alarms will cause the car not to start if they loose battery power. They come back on in an armed possition and you have to turn them off with a remote to get the car to start. Look under the dash on the drivers side. These things are hard to see some times. They are usually little black boxes with a bunch of wires spliced into the factory harness. If you do find one, get all the numbers you can off of the box and buy a transmitter for the box. Or you can try and remove it but some surgery is going to be in order for the harness and working under that dash is a royal pain.