Hello MacB,

In understand, mechanical engine or car noise (movement) gets mixed into your TPS position.

MegaSquirt code has never been part of our code, although we started with the same tuning software, we have since the start used a full rewritten c-firmware code.

We do have software filtering active on all sampled signals, but its timebase is non configurable. I'll evaluate if it might be helpfull to introduce such option in the future.

Best regards, Dave

The IAC is steady w/o PID active. IGN controls idle alone. This works best so far.
The problem i´m describing is that my throttle pedal is directly mechanically connected, so every slight movement is directly seen on the TPS, which leads to the problem that the TPS always shows small jumps even if i try to hold the throttle constant as the vehicle movements directly move my foot (e.g. 25%, ...)
This leads to small jumps in the VE table and the pulse width and the lambda signal jump as well. Driveability is quite good though.
I´m not sure if MegaSquirt is still in the back of the code. I saw that they have s SW-filter for every input signal.
Maybe some hidden switch or config ?

Hello MacB,

There are no software filtering settings for the TPS signal, apart from the hardware filtering which is on the v3 board.

I suspect you are referring to the closed TPS to slight Tip in condition as "jumpy" ? After reviewing your setup (config file) i suspect this is most likely caused by idle control de-engaging; you have not applied any Alpha-N idle valve load feedback therefore the extra air provided by the idle control motor is not mixed back into main load.

Secondly Idle advance control (ignition adjust) also has a great effect on the fuel requirements at a certain VE table position (most noticeably around low TPS openings). As a test you could disable it and see if it solves the undesired behavior.

Best regards, Dave