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-   -   Car wont start after injector swap PLEASE HELP (http://forums.mustangworks.com/showthread.php?t=31078)

Chipdog 11-11-2002 04:16 PM

Car wont start after injector swap PLEASE HELP
 
OK first off I have spark and I do have fuel pressure. I have tested with a noid light and it did not light up so the injectors are not being told to turn on. I have pulled apart the 10 pin and they are clean no corrations.
Where do I go from here?

Background
I just wapped to GT-40 heads and an Performer intake. I installed 30 lbs injectors but it was running too rich so I dropped down to 24s and now it wont start.

Thanks for the help
I just want to drive my car again its been too long
Chip

Coolbreeze 11-11-2002 11:00 PM

Did you hook the ground back up on the back of the head for the fuel injector harness??

MEDIK418 11-11-2002 11:51 PM

Did you try resetting the computer?

Chipdog 11-12-2002 07:34 AM

I didn't unhook the ground but i will double check it.
The batterie was out of the car for a day so I assume the computer is reset.

I ran the codes and all i got was tps out of range and emisions crap.

Chevysucks 11-13-2002 08:57 AM

did you forget to reconnect the relay switch in the rear hatch of the car? i forgot to one time while changing injectors and it wouldn't start. hope this helps.

Chipdog 11-14-2002 05:53 PM

never popped it
I am getting fuel pressure just not getting the signal for the injectors to fire

MEDIK418 11-15-2002 10:01 AM

If the battery was out of the car, it will still have the old computer settings unless you reset it. Do this. disconnect the ground cable from the battery, have someone turn on the key then touch the negative cable end to the positive. Hold this for say. . .ten seconds (count slow) This will reset the computer and it will have to relearn the engine, hopefully learning all the new settings as it goes.

Also, the TPS setting may be part of the problem. Try to set it as close to .99v as possible.

Chipdog 11-16-2002 10:18 PM

Fixed
 
Seems it was the TPS. I unpluged it and it started right up. I was told that if it was shorted out and said it was at WOT then the computer wouldn't the the car start.
Thank you all for your help.

Chip

PKRWUD 11-17-2002 02:06 AM

Re: Fixed
 
Quote:

Originally posted by Chipdog
Seems it was the TPS. I unpluged it and it started right up. I was told that if it was shorted out and said it was at WOT then the computer wouldn't the the car start.
Thank you all for your help.

Chip

I wish I had read this thread sooner! You are right, when the TPS tells the ECM it's at WOT during startup, the ECM assumes that's because it's flooded, and shuts off the injector pulse until it determines that the engine has fired, or is no longer at WOT.

Take care,
~Chris


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