Cruise Control

[ridway]

The CC on my petrol Gal is doing strange things.

Firstly it seems less sensitive and slower to respond. For a couple of years it has always been precise and responsive to a fall in speed, latley however the speed has to drop quite a way below the set value before it responds. It does eventually respond and eventually holds what is set. Another problem that has appeared at the same time is when the cruise is engaged and you request an increase in speed by using the stalk, ie moving it out, the engine responds and increases but when released the cruise drops out whereas before it would maintain the new speed. This doesnt always happen. Has anyone experienced these symptoms, or has any idea what might be the problem?

 

Rich

[Guest vr6galaxy]

The sluggish operation of the cruise control could be due to a vacuume leak? it could be that when you operate the call for an increase or loss of speed the loss of vacuume is taken up by the pump, but when the throttle pedal servo is trying to hold position its struggeling to do so due to a leak in one of the hoses, or the pump is failing? check all the hoses and the operation of the pump and switches on the clutch and brake pedal, these switches are both air valves and electrical switches! if the seal has gone on a switch then it wont hold pressure when needed

[Guest vr6galaxy]

The pump is behind the grill in front of the radiator, passengers side, before you ask :lol:

[ridway]

Finally got to work on the cruise control this weekend. SORTED.

VR6, you were correct, the problem was a vacuum leak in the hose that leaves the vacuum pump. Simply perished; just cut off the bad end and pushed it back on. The location of the pump on the 2000.75 model is behind the N/S headlamp assm, up in between the inner and outer wings, above the plastic wheel arch cover. Without prior knowledge even customs and excise would struggle to find it. It appears to be located differently on all the different models.

Pleased to sort it anyway, thanks

Rich

[Guest vr6galaxy]

Glad to hear it's all ok now :D is yours a MK1 or MK2 ? or you could have a cross over model?

[ridway]

Vr6, Mark 2 (lastest shape one without the chrome bits)

BTW before finding this leak I'd taken out a good proportion of the dash to get to the brake and clutch switches and valves. Very interesting how they got everything to fit behind that part of the dash.

 

Rich