new york buffalobill
New member
- Joined
- Jun 5, 2026
- Messages
- 4
- Reaction score
- 0
- Points
- 1
- Buick Ownership
- 1996 roadmaster wagon
i have a 1996 road master wagon lt1
replaced opti spark distributor cap wire and plugs 5000 miles ago last summer ran perfect.
this spring check engine light cam on for 02 sensor i put about 500 miles on it and i replaced all 4 of them.
runs like crap no power under load until i hit 20mph now i have a bad crank sensor po335 and po336 so i replaced the crank sensor, MAF sensor,throttle position sensor going back to the crank sensor checked the pins on the PCM all good continuity.
removed the upstream 02's to make sure cat arent plugged no difference. iam stumped any ideas apprecated
replaced opti spark distributor cap wire and plugs 5000 miles ago last summer ran perfect.
this spring check engine light cam on for 02 sensor i put about 500 miles on it and i replaced all 4 of them.
runs like crap no power under load until i hit 20mph now i have a bad crank sensor po335 and po336 so i replaced the crank sensor, MAF sensor,throttle position sensor going back to the crank sensor checked the pins on the PCM all good continuity.
removed the upstream 02's to make sure cat arent plugged no difference. iam stumped any ideas apprecated
