i have a 1989 5.7 tpi iroc 50,000 miles i have a no start problem. i have spark to the plugs,fuel pressure to the fuel rail, but no pulse to the injectors i am checking the injectors w/ a noid light any help would be great. thank you

 

did the computer quit possibly?

 

i am not sure how to test if computer is bad

 

is your security light on while cranking could be vats problem if not check to see if you have 12v on the pink and black wire on injector plugs the left bank uses one fuse and right bank uses another under dash inj1 and inj2 if you do then its a signal problem since you do have spark then its not a pickup problem in distributor, could be wiring from ecm to module, module problem power to ecm or lastly ecm problem let us know

john

 

the security light is not on and it cranks fine ,i do have 12 volts, i also have spark to the plugs,i have also swapped in a new module and nothing. do you think it could possible be loosing a ground.