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[QUOTE= Meanwhile the car runs fantastic, a dramtic improvement. But it also runs a bit hotter which I expected. It seems to me with the O2 sensors reading higher hydrocarbons ala no cats, the mixture will be more lean, and that will drive up the temperature. I have no science to back this up, just trying to figure out what the computer is doing.[/QUOTE]
There should be no change in the mixture the DME is calling for (other than compensating for the improved exhaust flow), as it uses the first set of O2 sensors to adjust the mixture. The secondary O2s are there to monitor catalytic efficiency, not to adjust engine parameters. What did you do with your secondary O2s, anyway?
Patrick
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