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On my Maxima it turns out there is an adjustment to the throttle positioning sensor. Basically I make the compuet think the throttle is closed more than it is making the tranny want to stay in a higher gear. It may be the same on other vehicles. On my Max it took loosening 2 phillips screws and twisting the senor in the same direction as the throttle plate twists, which made the tranny shift early.
I found this out my accident when I installesd a new TPS. I adjusted it reverse of how I described, and it downshifted sooner and refused to upshift without higer RPMs.
Hmmmm, wonder what happens if i go the other way....
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 RIP Maxima 1997-2012
Quote:
Originally Posted by jamesqf
I think you missed the point I was trying to make, which is that it's not rational to do either speed or fuel economy mods for economic reasons. You do it as a form of recreation, for the fun and for the challenge.
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