Check the codes from Pin 8 and 14. In my case, the air/fuel mixture side of the ECU had gone into a fail safe mode and replacing the ECU fixed the problem.

I did not have any symptoms, except for the check engine light and maybe a slightly higher fuel consumption.

The codes I had were:

DM Codes 3,4,19
Pin 8 Code 13

In your case, the problem appears to be related to the Throttle Control, PIN 14 should give you some information.

I would eliminate the fuel pump relay, OVP, plug/coil connectors, MAS as the causes, before replacing the ECU.

The usual method of testing the MAS and ECU is to replace them with known good units. That's how I tested them, and still have the old MAS (good) and the old ECU (causes the check engine light to come on but does not effect driveability).

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Zafar
94 E320 58000 Miles