My sons 1990 camaro stoped running when he was driving. Good spark, Good fuel presure, No injector pulse, The pink wire is hot at the injector, but no ground to the ECM. ECM or what?

 

Can you state if the car is TPI or TBI?

Did you try to check the injectors for proper operation?
If TPI, Id Volt/Ohm meter your injectors.. If all are fine,
I would then lean toward a possible ground issue, or a
bad component some where in the mix.

Id first check to see if the injectors are not the issue.

 

v6 6 injectors. ecm is not firing injectors. voltage at pink wire @ injectors, but no ground @ black wire.

 

pink wire at injector hot, try 2 NAPA ecm's and now the green/blk wire is also hot. try the old gm ecm and the grn/blk wire is hot going to ecm. does the ecm gound the grn/blk wire to the injectors?