Quote:
Originally Posted by bastereo
If you think you have a bad o2 sensor, just unplug both and clear the codes.
The computer will just ignore the o2 info and run both banks the same..
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This morning I unplugged the left and right side pre-cat O2 sensors. I then cleared the codes and started it up. At first it ran a lot smoother than it had in the past but that was short lived.
I took it out for a drive and as soon as I hit the gas pedal, the check engine light went out. This was the very first time I've ever driven the car without the check engine light. But the light would come back on when I took my foot off of the gas. The light always went out during acceleration and stayed off sometimes while coasting.
I cleared the codes while I was driving a scanned for new codes. While I was driving with the check engine light off and accelerating, I scanned for new codes and the only codes that generated were for the O2 sensors. When I ran the scanner again with my foor off of the pedal, I pulled the misfire codes for all driver side cylinders. I tried this method several times with the same results. Like clock work, as soon as I hit the gas pedal, the check engine light would go out.
my assumptions are:
If its not pulling the misfire codes while I'm driving then the fuel injectors are definitly getting power and spraying fuel.
there shouldnt be anything internal (lifters, cams..) because that issue wouldn't go away because I'm accelerating. If those parts were bad, they would always be bad even while accelerating and at idle.
Is the O2 sensor pre-cat driver side the issue or part of the issue or only a victim of something else?
Quote:
Originally Posted by bastereo
And didn't you already run the car without the o2 sensor installed, to check for a plugged cat?.
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Yes I did. Driver side pre-cat
Quote:
Originally Posted by bastereo
Man, this truck is getting bad, stripped valve cover bolt holes, galled o2 sensor bung, missing cabin air filter housing, still misfiring on one bank.
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These are extremely small potatoes as far as I'm concerned. I can easily remedy these myself at no cost and some of my own time. I've aready picked up a new filter houseing for $150 for the entire assembly.