openinverter forum

Setup: GS450h in an E46 with a Zombieverter

I'm using the stock throttle pedal wired up with usual min values of approx 200/400. If I put the GS450h in LOW those drop to 0/200 when I start up the car. They don't move in HIGH gear. This causes annoyance with the throttle code being angry about the dual throttle not matching or if I adjust it to match the lower values than it think the throttle is depressed at startup and fails to start.

I'm assuming this is related to LOW mode somehow either sourcing or syncing enough current to mess with the 5V regulator.

Has anyone else seen this?

Possible that you have a weak ground or power to the controller? Sounds like this to me.
If you think power and ground are ok, do you have any other IO that you can hook up to see if you have similar behavior with other high current IO? Can you switch stuff on and watch both for voltage on the + and voltage drop on the - side?