Weak Part Throttle or Full Throttle Shifts

Weak Part Throttle or Full Throttle Shifts

Vehicles with diesel engines

Cause/remedy:

1. Check adjustment of vacuum control valve, adjust if necessary.

2. Increase modulating pressure by 0.2 bar (corresponds to a half turn clockwise).

Note:
Increase pressure without pressure gauge.

3. Check whether the vent line to the vacuum control valve is clear (vent line terminates in passenger compartment).