Tobias , Where is the pullup reststor for the WOT input to the pic? The component you are using is indeed an opto but the output acts the same as an open collector transistor to ground. That is not a good design as the fets when shut off do not set a state to the pic input pin. Also have you checked the actual switch that sets the WOT state during the maximum engine output? Maybe the "vibration" is falsely triggering the pic.. Also, What is the purpose of R22?
Dave Purola,
N8NTA
Bookmarks