Disco 1 cruise control

The little black thing that is under the jack is in deed the vac pump and solenoid. It's mounted on rubber feet pushed through holes in the plate below it, they doo pull out and can be put back. It looks like if you reconnect the vac pipe your troubles will be over, unlike mine I think the ECU is duff.

Peter.

so news.tiscali.co.uk was, like...

Aha. There is nothing *under* the jack but a panel with a round hole in it and a void underneath. The little black thing I mentioned is bolted (no rubber feet) to the *side* wall of the jack/chock space and has no obvious nozzle on it to connect to a vacuum pipe. When I get the workshop manual I will find out what it does. From what you say, it looks like the vac pump is missing, although having examined the area I can't for the life of me see where it would go. I'm a bit mystified at the mo. Where is the vac pump mounted in relation to the jack?

Remove the jack and looking from the front of the car the vac pump is on the left just out of sight through the hole.

Peter.

I thought the vacume pump was on the left side of the engine when you are standing at the front. It has a largeish pipe that goes to the brake servo and a smaller feed pipe that goes to the egr valve under the wheel chock at the front right of the engine compartment.

No The large vac pump on the LHS of the engine is just for the brakes and EGR. The cruise vac pump is a small electric pump that is switched on to increase speed and a solenoid valve to let out the vac to decrease speed. It's behind the RHS headlight under the jack through the round hole.

Peter.

so Pete S was, like...

Peter you are a very clever and useful person. My right leg and knee will thank you all the way to Loire Atlantique and back.

Previous owner had riveted a plate across the hole below the jack, and glued on a rubber pad for the jack to sit on. Such a neat job I thought it was original! When I drilled out the rivets and removed the plate, there was the vac pump hiding exactly where you said. Very fiddly to get it out and in again, but all it needed was l cm cutting off the split pipe, and the pipe reconnecting. It's now working perfectly.

Cheers Peter.

so ntlworld was, like...

I think what you are describing is the CC actuator.