Quote:
Originally Posted by steffen707
It will be going at 70mph and then slowly slows down (don't remember if it was uphill on flat ground or what, mostly flat ground I belive), then I have to give more and more pedal to get it to pickup speed or to maintain speed, then it like starts to accelerate and i gotta ease off the pedal to get it to slow down accelerating to then maintain back at 70mph.
Is this a problem or the nature of the lean burn machine?
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This is part of the normal behavior of the d15Z1...At a constant cruise speed it will lean out as much as it can. Lean running makes less power and wind resistance will eventually start to slow the car down. When you start to push the pedal down to compensate, it takes a second for the mixture to richen up to where it makes more power.
Also, when cruising steady state, the ECU will periodically run rich a bit in order to keep the catalytic converter up to temp as running lean will cool off the catalytic converter.