Could be a vacuum leak in the feed to these devices.CAR3Y said:Hi, I have a 1991 Bentley Turbo R and the cruise control dosn't work and the heater dosn't blow hot air when doing about 70 mph, just wondered if these were common problems and any ideas what they might be ?? Thanks
Paul Yorke said:I think they will be different problems.
Speed control - Check brake light bulbs and relays.
You will then need to check the ecu is getting all the correct signals.
The speed sensor for the speed control is at the back of the gearbox and different to speedometer one.
Before you go digging in to the heater tap you need to make sure that your car is actually heating up to normal operating temperature. Where is the needle on your temperature gauge coming to rest once the car has warmed up?Would you please explain where that tap is?
Mine is a 88 Spur. It never really pumps out more than slightly warm air.
You have to be very careful as many people do not properly understand these cars. Very easy to waste money on them!Thank you very much to singlemalt for the reply to my post which proved correct . I was quoted recently £1,450 to replace heater matrix as it was blocked but that did not seem logical to me so I resisted.
Then searched for a solution and re-found my post and the answer. Was made more logical when the heater cut off when simply revving the engine. I stuck to the problem description given by singlemalt and despite resistance from the garage the following email arrived..
We have liaised with our technical department regarding the heating system in your Bentley ,which they had advised fitting a heating tap to the matrix as there was a possibility that there was a breakdown of the magnetic field which controls this ( almost like your thermostat )
Wow .... A magnetic field ... It sounds so scientific to little old me ...
Any great result ..thanks again singlemalt