OK , here's a brief summary of events... made fuel pump access door, repaired fuel pump, replaced ignition module, replaced cap and rotor. Fuel is now reaching up to the throttle body, but won't come out of the injectors ?? The car cranks over no problem, but will not start due to no fuel coming out of the injectors. Please help .

 

I presume that you still have a cross fire system installed.

- Get a DVM make sure that you are getting +12 volts at injectors with key in run and while cranking! The red lead on injector plug should be +12 while blue or green wires get pulled by the ECM to ground.

- Make sure that you are getting consistent spark during cranking. If you are not getting spark - check ignition module and reluctor coil. If ECM is not receiving DRP pulses from dizzy it will not fire injectors. A quick check - spray some gas into TB - if it fires problem with ECM not pulling injector control lines down. Otherwise check your dizzy, coil, etc. Post your findings.



//RF

 

[quote=RFmaster;3861935]I presume that you still have a cross fire system installed.

- Get a DVM make sure that you are getting +12 volts at injectors with key in run and while cranking! The red lead on injector plug should be +12 while blue or green wires get pulled by the ECM to ground.

- Make sure that you are getting consistent spark during cranking. If you are not getting spark - check ignition module and reluctor coil. If ECM is not receiving DRP pulses from dizzy it will not fire injectors. A quick check - spray some gas into TB - if it fires problem with ECM not pulling injector control lines down. Otherwise check your dizzy, coil, etc. Post your findings.

Yes I do... but this question is in regards to my son's 91 Camaro RS 305 TBI.

 

i have that problem with my crossfire. im scrapping it for a carb.....

frustrating aint it?

 

Its a 91 RS , not a crossfire, and yes... it is frustrating. Is there anyone that has any ideas besides saying its frustrating? its only obvious that its frustrating or I wouldn't even be posting.

 

has anyone one figure it out cause im having the same problem with my 89 iroc

 

Same troubleshooting principals apply to 91 TBI.

Check for spark first - it's very common for reluctor coil connector to bust over time due to age. Often this happens after ignition module replacement! If you are not getting spark engine will never fire up! Pull #1 Cyl - crank over with spark plug tester attached - verify spark during cranking!


//RF