Hello MrNJ!

I've had two problems with your ECU and Tranmission MCs:

1. ECU PID for throttle/idle doesn't up throttle fast enough when coming to a stop, so the engine will slowly die in gear 0. The starter motor kicks in at 3 RPM, as set, but the PID still isn't fast enough to increase air/fuel throttles to allow it to idle - the starter motors just keep on kicking.

This is easily fixed by increasing the PID Proportional gain to 0.5 from 0.02. Works fine after that.


2. The transmission MC is missing an AND gate for auto downshifting. The transmission will downshift at any RPM, meaning engine RPMs just go up like crazy with each downshift.

This is easily fixed by adding a check for engine RPM before downshifting. The way I did it was add an AND gate that checks that the throttle is below a certain # (can also be done with your "downshift at rpm" property slider) along side your -999, 0 Threshold gate from channel 2 (w/s) and feed that AND into the system rather than just the Threshold.

3. Braking hard can easily cause the engine to stall. I added an external fix to this by adding a threshold to check for w/s -1, -0.01 which disengages another clutch to the wheels to avoid a stall. A check is needed in the transmission MC for negative w/s values, where the main clutch would disengage under (hard) braking.

Would love to see these fixes so I don't have to keep fixing my own vehicles!


Many thanks.