PeachParts Mercedes-Benz Forum - View Single Post

stevebfl · #2 03-17-2007, 02:52 PM

1. Could the 3rd to 4th shift flair and the slapping vent both be caused from too much vacuum?
2. How can I adjust the vacuum?
3. Does a 1995 E320 gas engine have a vacuum modulator like the diesels?
4. If I have a vacuum modulator, does it control the vacuum for the entire system, or just the transmission?

1 - Not sure what you mean about the slapping and there is no such thing as too much vacuum in a gas motor... the more the better!

2 - you can't adjust vacuum directly. Vacuum is the byproduct of proper running. The better it runs the more vacuum at any throttle position.

3 - The 95 E320 does have a vac modulator like a diesel.

4 - the vacuum modulator never controls vacuum it responds to vac. It is the transmissions way to interpret engine load.

based on your stated series of events I would first adjust the control pressure cable (bowden cable) to achieve earlier shifts! If that didn't achieve the desired effect I would turn the modulator in a turn.