scott_dont05
New Member
- Joined
- Aug 1, 2014
- Messages
- 10
- Reaction score
- 6
- Points
- 3
- Location
- melbourne victoria
- Members Ride
- vx s2 ss 5.7L sedan
Hey all,
Thought I could have answered my problems by trawling this site but I am at a dead end.
Car is VR Calais with 5l auto. Just won't rev past 3-4k when coolant temp has got up past 85-90 deg, coughs and splutters until you back off the right foot.
Used Tunerpro, found out O2 sensor voltage is dropping off to almost zero under heavy load. Replaced sensor with Bosch 2 wire, no change.
Disconnect O2 sensor, car runs fine.
Checked wiring to PCM from sensor plug, fine. Checked earth from sensor to PCM and PCM to body, fine.
Tried another PCM from 5l auto, no change.
Ran new wiring from O2 sensor to PCM, no change.
About ready to just run it without the O2 sensor, it's not a daily driver.
Would appreciate any insights anyone may have, cheers.
Thought I could have answered my problems by trawling this site but I am at a dead end.
Car is VR Calais with 5l auto. Just won't rev past 3-4k when coolant temp has got up past 85-90 deg, coughs and splutters until you back off the right foot.
Used Tunerpro, found out O2 sensor voltage is dropping off to almost zero under heavy load. Replaced sensor with Bosch 2 wire, no change.
Disconnect O2 sensor, car runs fine.
Checked wiring to PCM from sensor plug, fine. Checked earth from sensor to PCM and PCM to body, fine.
Tried another PCM from 5l auto, no change.
Ran new wiring from O2 sensor to PCM, no change.
About ready to just run it without the O2 sensor, it's not a daily driver.
Would appreciate any insights anyone may have, cheers.