Engine Dies While Driving
 

My '88 300 TE (wagon) stalls, intermittently and out of the blue, when I'm going anywhere from 30 mph to 50 mph, and sometimes at stop lights/signs. There's no connection between accelerating/decelerating--it simply dies and the dash lights all come on. The engine is always warm and has been running for at least 5+ minutes before this happens. It has to sit for 5-10 seconds before it will restart--if it's started immediately after, it behaves as though it's flooded and won't turn over. I've had many items replaced on the car, including the fuel pump and main relays, crank sensor, OVD, but it still dies. It had a new fuel pump put in in '99. The problem has been happening for over a year. (125,000 mis. on car)
Any clues? I'm desperate!
Thank you.
:confused:

What do you mean by 'main relay'? The fuel pump replay is the most common cause of this problem, the OVP would not cause the enigne to cut out at speed.

Also check out the fuel pumps, there will be a pair under the car near the right side back seat and possibly another one behind the diff.

Use the search
 

If you searched the forum you would have found my thread in which I have the exact same problem with my 190E

The fuel pump relay overheats if it's old and there is moisture inside it, causing it to kick in the rev limiter which shuts off the pump and causes the engine to coast to a stop, and yes, it will only happen after the car warms up.

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