ok so got this friend with a 91 camaro vert 5.0 tpi 5 speed,

wont fire, it cranks there is no spark, and to top if off the fuel pump does not prime when the key is turned on. scanning the ecm there is no reference rpm from the dizzy. and theres no fuel injector pulse width, vats problem is marked no,

now before you tell me the fuelpump doesnt work if theres no reference from the dizzy it should still prime with key on engine off atleast. when i went to the fuel pump test connector i supplied battery voltage and nothing.


before i got there the ignition control module and coil were both replaced.

im lost i have alldata though

 

Would the oil pressure sender possibly be related?

 

no for 2 reasons cause we are seeing oil pressure, and there would still be spark and the fact that it doesnt prime when the key is turned on.

ya its makin me think

 

Which is cut when oil pressure drops, fuel or spark? I'd also look @ the ECM....

 

the ecm cuts injector pulse width if it doesnt see a reference voltage from the distributor.

how ever it still doesnt prime with they key on engine off. which it should prime for like 3 seconds.

tried the ecm did nothing i think its gonna be a common power source or ground for both