Unrefined Cruise Control

[rainbowl]

I do find the Cruise Control very handy on my 2.0 TDI, but increasing / decreasing the speed is very unrefined with the cruise seemingly trying to instantaneously increase or decrease the speed when I want to adjust it, so is not at all smooth. I also find that going down certain hills that the cruise makes the car quite jerky and you can hear it repetitively applying the throttle and then lifting off again.

The jerky bit was mentioned in a Volvo forum, so maybe is to be expected ?

 

[90landrover]

I also seem to have a jerky cruise control but I have a mate who has super smooth cruise control on his tdi, I think that maybe there is a slight air leak in the vacuum operating system making the suction vary.

 

[rainbowl]

I'm not sure that my later model uses vacuum pressures any more - I thought they were totally electronic now - but happy to be wrong