i have an 88 iroc 5.7l. i have fuel pressure and spark. i have a plug and play ecu attachment from accel that came with the car. it was one of the first ones made. it ran great saturday and then sunday crank and no start. pump works and all just no fuel any ideas on why the injectors will not fire

 

Do you you have +12V at the injectors? Is it a VATS equipped car?

 

i am new to the third gen stuff. i work on imports what is vats. i have to check the injectors for voltage i just didnt know if this was a common problem

 

VATS is the security system. Is there a flashing "SECURITY" light when you try to start it? VATS can keep the injectors from firing. Do a search on it here. Each bank is fed +12 by separate fuses. The ECM ground the injectors to fire them.

 

ok no vats on the car it ran last saturday and then on sunday nothing. no power to injectors no hot side. fuel pump runs fine i have pressure. starting to belive my computer took a dump

 

figured it out pick up on the distributor replaced the distributor running good thanks all

 

Im having a similar problem, injectors not pulsing. BUT I have 12v to BOTH injector wires with key on. What pick up are you refering to on the distributor?

 

First I'd unplug and replug the connectors a couple times. The pickup coil is under the rotor. You have to take the dist out and the gear off to change it. Not that big a deal really. Make sure you mark where both the base and rotor are pointing to before you pull it. I'd change the module too if you're in there. They are both pretty cheap parts. Also make sure there isn't a lot of play in the shaft before you waste your money on parts.

Could be a bad harness or ECM too, but less likely.

 

would a bad pickup explain why I have 12v on at both injector wires?

 

You should have 12V at all the injector connectors when it's not running. The ECM fires them by grounding the other pin.

 

so the pickup should be the most likely issue?