I have an '85 Golf Ex-Cup Car. I recently rebuild the motor, and everything runs smoothly. Or at least it does below 5k RPM. Over 5k, it misfires horribly and has no pull at all. Adjusting the timing and air sensor plate make no difference, so I started looking deeper.

I finally got down to the Differential Pressure Regulator current, and it was 0 mA. I checked the voltage at the connector, it was 0V. The wires are continuous back to the computer, so it looks like the computer is not sending a signal.

Does this mean my computer is dead?

Would a dead DPR cause the engine to lean out at high RPM?

Is there anything else I should check?

Thanks,
Brian