Posted to the Waveform Library on 4/17/2002

B230 motor, warm, at idle, W/R wire at MAF. Snap throttle about 1/2 open and release. MAF voltage jumps to 3.58 in 100ms. I think this is what the ECU uses to jump the inj pulse width from 3ms to 10ms (will jump with throttle switch disconnected).