rough idle and stalling
I have a 95 G30 van with the 4.3 V6. Stopped suddenly in reverse and started running rough. barely made it home. Noticed IAC was opening too far and moving sporadically. Replaced it and intake gaskets. Also replaced TPS, CTS, MAP sensor and O2 sensor. No change. Checked plugs and wires, retimed. Still no change. Changed throttle body gasket. I have noticed when I remove vacuum line to MAP and plug vacuum port it is at least drivable but runs a little rough and stalls occasionally. Anyone have any ideas?