I have a 93 240 Classic Wagon and it seems to be stumping the mechanic. It has a very erratic idle when the brake is pressed or when in park. It is a low to high idle and finally sputters out and dies on the low end. I have just driven the car 3000 miles from San Francisco to Rhode Island. I had a ton of work done to the car in SF.....it made it to Rhode Island but finally broke down. Before I left SF I had the air mass meter box and thermostat replaced, it had the same issue it is having now only the engine light was on with the oil light. After those parts were replaced they also cleaned the throttle and inspected the idle control valve. The problem seemed to have progressively come back after about driving 2000 miles, there is no engine light on...only the oil light. Again this only happens when the brake is engaged or in park. When the car finally broke down, I was driving through hard rains and hit water that was up to the wheel wells. I was able to pull off to a parking lot, but while pulling off was giving it full throttle and it barely made it to a spot in the lot....then died. An hour later it started up again only with the same problem, oil light on, low to high throttle and barely drives.

Any suggestions. Kind of a lot of info, sorry about that.

thanks.