95 LT1 Vette Rear O2 sensor functional?
Thread Starter
Racer
Joined: Aug 2001
Posts: 288
Likes: 1
95 LT1 Vette Rear O2 sensor functional?
I'm having a disagreement with my "tuner". He claims the rear
(downstream of cat) o2 sensor on my 95 LT1 is non-functional and
does not have it hooked up.
I find it hard to believe:
1) GM would install a third heated o2 sensor and it be non functional.
2) The un-terminated sensor connector would not be causing problems.
My car has classic bad opti-spark symptoms, but they seem to all go away once it's above 185 degrees water temp.
It's not quick and easy to re-attach the sensor, as the car has long tube headers and random tech cats. I have to weld on a bung before I can re-attach the 3rd sensor.
Are there drivability issues when using long tube headers?
Thanks in advance for any comments.
(downstream of cat) o2 sensor on my 95 LT1 is non-functional and
does not have it hooked up.
I find it hard to believe:
1) GM would install a third heated o2 sensor and it be non functional.
2) The un-terminated sensor connector would not be causing problems.
My car has classic bad opti-spark symptoms, but they seem to all go away once it's above 185 degrees water temp.
It's not quick and easy to re-attach the sensor, as the car has long tube headers and random tech cats. I have to weld on a bung before I can re-attach the 3rd sensor.
Are there drivability issues when using long tube headers?
Thanks in advance for any comments.
Burning Brakes
Joined: Nov 2006
Posts: 1,102
Likes: 1
From: Portsmouth Virginia 396LT4 435RWHP/400RWTQ Best so far 11.26 @ 123mph
Mark,
Your tuner is correct. The rear O2 sensor can be disconnected without triggering any fault codes on the 95.The 96 true OBD2 system is a different story. TPIS can also confirm this for you. I have run their TPIS long tubes for 8 years now with only the two front sensors.No codes will be set.I run LT1 edit software with only reads 1 left and 1 right sensor.
Rick
Your tuner is correct. The rear O2 sensor can be disconnected without triggering any fault codes on the 95.The 96 true OBD2 system is a different story. TPIS can also confirm this for you. I have run their TPIS long tubes for 8 years now with only the two front sensors.No codes will be set.I run LT1 edit software with only reads 1 left and 1 right sensor.
Rick
