Hesitation/Stuttering at 2,000 to 3,000 RPM

[Bflaker]

So the TPS Ignition Retard columns are for Throttle tip in only? I was reading the help file in K-pro and that appears to be what it does. So....does it only retard timing for that split second of initial throttle tip in? Also, did you set it to 100% retard or -100% retard? I'm gonna try it and see what happens. Thanks for the help.

[Bflaker]

Well, I tried setting all the gears to 100. It made throttle tip in very bad. It had a bad sputtering at the initial tip in on each gear. I put it bakc to normal and it was better but still sputtering slightly. I tried making gears 1,2,3, and 4 all negative values like the high gears, and that took care of the sputtering on initial throttle tip in. I'm still getting the weird surging at very lil part throttle when coasting down a hill. The car starts bucking back and forth and the A/F's go from full lean to stoich. You can tell the car is going back and forth between two operating modes, but I don't know why. Could it be throttle cable adjustment? Could it be my min and max values for the TPS Sensor?

[Spunkster]

Since you have not posted the calibration and a datalog showing the problem is is nearly impossible to give recommendations on what to change.

[kial007]

any update on this?