What is the condition of your wiring.

I am not sure of the 93's, but the wiring on the 94-95 series causes all kinds of problems.

Misfiring and rough running were the symptoms I had. Rebuilding the engine harness and the ETA harness returned the engine to smooth running.

I first rebuilt the engine harness which made the car partially bearable to drive. Rebuilding the harness attached to the Electronic Throttle Actuator eliminated misfires altogether.

A telltale sign of ETA problems is the loss of Cruise control functionality.

Check that out first.

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Brian G.

1994 E320 Wagon with many warts SOLD
1995 E320 Wagon with a beauty mark or two FOR SALE