Guys, I have searched and read and come to the conclusion that this code could be from a "bad" new Opti? Especially when using a NON AC Delco or Delphi part? I ordered one from RockAuto, got the A-1CARDONE part and am experiencing these symptoms. I got the code P0336 after installing it (not my first Opti install) so I simply replaced the CPS. Further investigation (and still having the code) led me to believe that I had installed the Opti wrong. So I removed it and reinstalled it, cleared the code and it came right back on the 2nd run cycle. Live Data says I am at -20* ignition timing....car runs ok, but smells pretty rich. I wasn't getting the code before the swap, so I have to believe that I am experiencing a faulty distributor?
Yep, wiring is good. After I replaced the CPS and the code came back, I checked the wiring. I do have the old Opti, I changed it out because the car hit 100K and I assumed it to be original as well as plugs and wires. It ran horribly whenever it would rain so I decided to go with a new unit.
Wonder if I could/should use the cap/rotor off this one?
I recently bought a 55,XXX FWB that the seller stated he had a shop charge him $1,100 to install a new Opti. I commented that cost was crazy and he said it was "the expensive one ordered from the dealer". I've got 0336 also but it runs EXTREMELY well. I don't have the history to know whether the code prompted the new Opti, or the new Opti caused the code. A new CPS didn't fix it, and the wiring along the oilpan reminds me of a hard sun-baked worm.
I hear the harness is another point of problems so I'll try that first. Then, it's tear down the Opti to check for signs of a fubared install, and then perhaps rebuild an old oem Opti I have from another car.
Back to yours: What I've read from search is the cheap units don't use a Mitsubishi optical. ?????? If that's the case is it possible to swap out the reader ???? Still on the car ???? With your original one ???? Then maybe a new namebrand cap & rotor as BALLSS suggests if cheap Optis use poor versions of those too? Just dumb questions. What is it about your installation that makes you think you did it wrong - twice? Again just dumb question.
Yep, wiring is good. After I replaced the CPS and the code came back, I checked the wiring.
I do have the old Opti, I changed it out because the car hit 100K and I assumed it to be original as well as plugs and wires. It ran horribly whenever it would rain so I decided to go with a new unit.
Update: I took the C&R from the new unit, and put it on what I believe to be the original AC Delco unit. 4 run cycles without a CEL. I am still blown away that my brand new Opti was the culprit, but it seems to be fixed.
Thanks for closing the loop. Let's hope that uninstalling that '$1,100 New Opti' does the trick on mine too.
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