Apologies for not responding earlier and appreciate all responses.
All Specs and Numbers below are for '94-'95 H-Body GMs
Issue was PCM...
PCM/ECM Part Number 16183247 / 590-03576 will also work while searching on eBay
Was a very easy switch, disconnect battery for at least 5 minutes, drop the underdash kick-panel, remove the wires, push PCM up hard, push back on clips and wiggle down and out. Replacement slips up and in and snaps in place. If you change the ePROM from your old one you DO NOT have to do a Security ReLearn...
What is the Security Relearn Procedure? - 3800Pro.com Forum
What lead me to the PCM after everything else I had tried was I was unable to retrieve any codes while bridging across Pins 9-5
The Dreaded OBD 1.5 Thread. Got a '94 or 95 PCM? Look Here!
PCM came outta un-wrecked '93 LeSabre with 302k miles on it. I wanted to find one in a wrecked vehicle because I knew it woulda been working when the car stopped.
As the guy at one of the yards says - " he has lots of people ask if the transmission/engine is good in that wrecked vehicle and his response is 'well, they sure as (heck) weren't pushing it that fast when it stopped!"
Fuel Pressure was marginal
Specs for Fuel Pressure are (along with my measured values)
- 30psi-34psi while idling (vehicle ran at 31psi)
- 47psi in prime with return line restricted (vehicle was at 41psi UN-restricted - I'll be checking in the future with return restricted)
- 41psi-47psi after prime with key off (vehicle was at 37psi...this could be due to not restricting while priming)
Car runs fine at these pressures.
Due to the low cost of PCMs for these (mine was $30 that I pulled) I want to make a separate post with a title similar to "Check your PCM with these symptons..." and post a concise chronology of what I have been thru.
What do you guys think about that?