More ?'s

[907DAVE]

What causes the truck to jerk at very light throttle or when easing off the pedal, especially with the TC locked?.......MFD?



Can SOI affect how touchy the pedal is?

[Power Hungry]

Indicated Torque Map and Exhaust Backpressure Torque Loss are used to estimate how much NET torque the engine is generating. This value is then used by the transmission portion of the strategy to generate the base line and shifting pressures. The Pressure Slope is basically how many PSI per Ft./Lb. of torque to set the line pressure at. The the Pressure Offset is then added to this value.

For example:

Your Pressure Slope is 0.1811
Your Pressure Offset is -6
The Calculated Torque Output is 420 Ft./Lbs.

420 Ft./Lbs. x 0.1811 PSI = 76 PSI
76 PSI + (-6) PSI = 70 PSI
The PCM will set the line pressure to 70 PSI.

This also goes for the shift slopes and offsets.

Jerking at light throttle can often be caused by MFD or ICP. MFD is more appropriate for adjustment since it directly relates to throttle position.

Hope this helps.