Heads/Cam/Headers keep killing bank 2 o2 sensor??
04-28-2007, 01:02 PM
#21
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Well, I just swapped out the spark plugs and wires.
The plugs all read correctly. NGK TR6 plugs gapped at .045, no problems with those.
I'm sure there is no exhaust leak before the o2.
The parts counter has been swapping the plugs under warrantee, until the one I just bought.
I know something is killing the sensors (they aren't just going bad on their own), I just don't know what.
The plugs all read correctly. NGK TR6 plugs gapped at .045, no problems with those.
I'm sure there is no exhaust leak before the o2.
The parts counter has been swapping the plugs under warrantee, until the one I just bought.
I know something is killing the sensors (they aren't just going bad on their own), I just don't know what.
04-28-2007, 01:04 PM
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Originally Posted by ArcticZ28
Are you SURE there are absolutely no exhaust leaks before the 02? That would do exactly what you are describing. With a leak, it dumps fuel b/c the 02 reads leaner than true, which causes it to die. However, it won't be noticeable necessarily with tuning, as the 02 will be commanding more fuel to get the right reading, so it will look like it's the right A/F, but obviously won't be because the car is running like crap from the extra fuel.
But, I'd be able to see this by logging my STFTs and LTFTs. There would be a difference between bank 1 and bank 2.
With a good o2 sensor (when I swap it), the fuel trims are very close (+ or - 1 from each other). After 3 months when the sensor goes bad, they're way off (-1 vs. -15 at idle) and the car drives like crap at part throttle.
04-28-2007, 01:55 PM
#23
Since it fails over time, you have a condition that is killing it.
Might be a slight leak in the exhaust system.
You can swap injectors from one side to another and eliminate them or confirm they are your problem.
Same with coil pacs.
Have you done a compression test?
Might be a slight leak in the exhaust system.
You can swap injectors from one side to another and eliminate them or confirm they are your problem.
Same with coil pacs.
Have you done a compression test?
