i thought if injectors were firing, then optical side must be ok..
and i have spark, so high voltage side must be ok, right?
is it possible for an opti to die in a way that would pass those very primitive tests?
Have you scanned for codes? Two opti failure codes won't set the check engine light, DTC 16 & 36. DTC 36, opti no high resolution pulse, will still allow injectors to operate, and will fire the spark plugs. It should run with this code, but without the high res signal timing will be off and it will run rough.
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1995 Firehawk #528 resto-mod underway
Planned 383 rebuild: 195cc competition LT4 AFR heads, custom cam grind (still debating specs), 6" or 5.85" rods, forged internals
Upgraded T56: Viper mainshaft and 2nd gear, steel 3/4 shift fork, Billet keys 1-4, bronze shifter cup, internals Cryo'd and REM'd