My 2002 pontiac montana has been hesitating, misses and stalling. Would a TPS sensor cause this? I've replaced the preconverter o2 sensor ( the one that affects pcm and air/fuel ratio) and still problems. Heres the thing it runs fine until it warms up. I can rev it in park and its fine warm. I go to test it and drive down the road and starts all over again. If I dont accelerate too much I can make it back home. Would the post converter cause this problem? I hooked up a scan tool and read the parameters to the postconverter o2 sensor and the voltages aren't what the car manual says. It says it should hover around 0.40 volts and change slightly however my readings indicate that its around.59 and when I accelerate it goes below 0.40 volts. Is this normal or is it something else as the price of an o2 sensor is $150 and I already bought the wrong one! Thanks
have the same problem?
Monday, December 20th, 2010 AT 12:07 AM