1991 gta trans am
 

I need help with a 1991 trans am gta
5.7 tpi, I have no pulse at injectors .
Was wanting to check wires going intO the ECM
Does anyone have diagram of ECM pins ?
Mainly want to check grounds going to ECM

Re: 1991 gta trans am
 

do you have spark ? if not icm or distributor pickup coil would be bad.

http://www.gearhead-efi.com/Fuel-Inj...CM-information

Re: 1991 gta trans am
 

Plenty of spark and all ignition parts have been replaced
As well as sensors including oil etc etc, and no vats problem, no light staying on
It is not getting the pulse signal from ECM

Re: 1991 gta trans am
 

check the grounds behind the passenger head.
ECM grd D1 Blk/wht
ecm ground D6 Blk/wht
ecm ground D7 Blk/wht

If all of those are good looks like you lost your injector drivers, If these are the original multi-tech injectors the injector coils fail and short out. southbayfuel injectors has some awesome bosch 3 22#hr injectors. If thats not the case looks like you need a new 1227730,16196344 or 16198262