myth... CONFIRMED!!! My opti is toast. No pulse going from my opti to the PCM to fire the injectors.
Noid light in and scanner hooked up cranking over no injector pulse and the rpm reading stayed at 0 then randomly hit 193? Strange.. This led me to test stuff that sends signal to the injectors. Tested the ICM, good. Tried heating up the back of it imitating a hot motor with heat gun maybe the ICM was bad and only worked when it got hot. Nope. Wires from PCM, good. Grounds, good. So I got as far as suspicion that the opti wasn't giving a low res pulse or whatever the PCM needs to know to fire injectors. So I got an idea ripped the opti off my shortblock in my shed plugged that opti in grounded it and spun it by hand while cranking INJECTOR PULSEEEE! Noid lit up. So that sucks this concludes that my opti fails to send a pulse to the PCM to fire the injectors and by testing the spare opti I had seeing that it got the signal... How clearer can it get.
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95 Z28 hard top - LT1 | 4L60e | bolt ons | Yank SS3600 | suspension | viking coil overs | 3.42 10 bolt | 3520 lbs - 12.331 @ 108.22mph 1.668 60'
08 Saab 9-7x - L96 6.0 swap | L92 heads/intake/TB | LS6 cam | LS9 springs | 7.425" hardened pushrods | CAI | 1-3/4" stepped LT's | catback | 4L60E | FTI 3000 278mm converter
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