Constant Timing Drop At Highway Speeds
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Joined: 04-15-07
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From: Canada , Nova Scotia , Sack Town Baby !!
This doesn't necessarily rule them out. There's an infant mortality rate for electronic components, so something failing out of the box or soon after would not be that unheard of.
How much tuning has been done on the car recently? By you or others? Have you done a file compare with a known good file or stock/GMS1 file to see if something got (accidentally) changed somewhere?
Odd thought... maybe check the clutch switch/switches? Is it activating (thinking the pedal is being pushed) and pulling timing? The event occuring after a shift makes me think that might be happening. Although it's odd that it only otherwise happens during steady-state cruising. So maybe it's not that... but might be something to keep in mind.
My bottom switch acts weird occasionally and won't let me start the car.
I figured as much, but haven't logged one, so couldn't say for certain.
How much tuning has been done on the car recently? By you or others? Have you done a file compare with a known good file or stock/GMS1 file to see if something got (accidentally) changed somewhere?
Odd thought... maybe check the clutch switch/switches? Is it activating (thinking the pedal is being pushed) and pulling timing? The event occuring after a shift makes me think that might be happening. Although it's odd that it only otherwise happens during steady-state cruising. So maybe it's not that... but might be something to keep in mind.
My bottom switch acts weird occasionally and won't let me start the car.
I figured as much, but haven't logged one, so couldn't say for certain.
So the issue has been resolved. Thank god. The problem was in the tune, My ecu does NOT like having the lower load ( upper left hand cells ) changed in hp tuners. I had made a FEW SMALL changes in the 15 to 30 percent spark tables. And for what ever reason the ecu takes a pissy hissy fit and instead of making the transition to more spark in those few cells. It fully pulls ALL timing back to 0 degrees. Once i put a tune file from April on the car. It runs perfect again. No crusining issues or issues after shifting either.
So my next question is about my lamda only showing in hp editor up to 80% and if the .85 lamda is lean enough while running meth ? Or should i drop the lamda down to say maybe .84 ?
Thanks
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