Setting the distributor

[Dennis Wilkie]

I've actually never had it diagnosed. I bought a Foxwell NT614 Elite but never got a chance to use it. I sold it because I couldn't find a 16 - 12 pin adapter that actually worked. But the light has never come on when it was just sitting at idle. That was the only time it's ever happened. I would've sworn it had something to do with that O² sensor and no catalytic converter with the exhaust dumped right before the bed. But I put a brand new sensor in it around 4 yesterday and have driven it a little over 30 miles today without seeing the light at all.

 

[PlayingWithTBI]

Try the "paper clip" test. Your PCM will store codes up to 30 or 40 key cycles even if the light doesn't come back on.
https://www.freeautomechanic.com/diagnostictroblecodes5.html

 

[Dennis Wilkie]

Yea, the jumper in the top right 2 plugs. But that ECM was reset yesterday when I got the O² sensor in since I had been fighting to get the old one out for over a week and it was completely useless with a melted plug. These are the types of things the previous owner did everywhere that i've been trying to correct for 10 months, lol. Apparently it was soldered in place before I bought it. Will the codes still be stored after the reset?

 

[Schurkey]

Nope. Disconnect the battery, and the GM OBD-1 gets amnesia.

 

[PlayingWithTBI]

How was the PCM (Powertrain Control Module since the 92+ had trans control too instead of the ECM which only controlled the engine - trivia), was the battery disconnected or was it reset with a scanner? If it was by either method then yes, you'll have to drive it a while to recreate the malfunction.

 

[Dennis Wilkie]

It's an ECM, and I reset it by disconnecting the battery and turning the lights on, and it sat like that for a few hours. The one on the bottom is what I have in it. The other one was in the back floorboard when I bought it

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[PlayingWithTBI]

My bad, I forgot you put in an 87 engine in your 92 so, you have the 7747 ECMs there. Anyway, you'll need to drive around for a while to see if your ECM sets another code.