So, the car now gets 30 MPG on the highway.
2004 MT, Pettit Engine, was AP tuned and getting 25 MPG. I had to pull the AP tune because it is going into the dealer to troubleshoot a 610 error. I have a set of D585 coils. It is not the change in the dwell table because my dumb self seems to not have the new dwell map installed.
In the cruise range, 3,500 RPM and .40 Load, the fuel tables are identical between what I think is stock and my tune (Lambda =1). Timing is identical. Dwell is identical. MAF is scaled a bit, VE changes are very minor, only a few percent here and there. All the other tables are the same. MPG is measured on my Ultra Gauge, and the rate the gas gauge is going down mimics the found MPG.
My tune had a LTFT in this range of about 0 (MAF, Injector 1, VE). The factory tune has an LTFT of about +10. Load is about .35 at cruise, same as before, 0.39 with the AC on. All the other tables are identical with one exception, OMP.
My tune apparently has 6X more OMP flow at this point (3 stock vs. 18) and I premix half an ounce to a gallon. Yeah, I am not sure why I did that, I meant to make my changes outside of the cruise zone and let pre-mix take care of that area. I will back it out and test once I run through the new ECU protocol.
The question, can the extra oil account for that big a change in MPG, or is something else going on?
Thanks,
2004 MT, Pettit Engine, was AP tuned and getting 25 MPG. I had to pull the AP tune because it is going into the dealer to troubleshoot a 610 error. I have a set of D585 coils. It is not the change in the dwell table because my dumb self seems to not have the new dwell map installed.
In the cruise range, 3,500 RPM and .40 Load, the fuel tables are identical between what I think is stock and my tune (Lambda =1). Timing is identical. Dwell is identical. MAF is scaled a bit, VE changes are very minor, only a few percent here and there. All the other tables are the same. MPG is measured on my Ultra Gauge, and the rate the gas gauge is going down mimics the found MPG.
My tune had a LTFT in this range of about 0 (MAF, Injector 1, VE). The factory tune has an LTFT of about +10. Load is about .35 at cruise, same as before, 0.39 with the AC on. All the other tables are identical with one exception, OMP.
My tune apparently has 6X more OMP flow at this point (3 stock vs. 18) and I premix half an ounce to a gallon. Yeah, I am not sure why I did that, I meant to make my changes outside of the cruise zone and let pre-mix take care of that area. I will back it out and test once I run through the new ECU protocol.
The question, can the extra oil account for that big a change in MPG, or is something else going on?
Thanks,
I did something, not sure what... MPG
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