Ive spoken about this before. When i start my Turbs up from cold it fires up fine but then after a few seconds the revs just drop down to around 600rpm.So then i adjust the rev screw under the throtle housing but once the car has warm up then the engine revs to high and then i have to turn the revs back down. I was thinking would it make a difference to the problem if the THERMO TIME SWITCH and the TEMPERATURE SENSOR was faulty. Ive been thinking about changing these as well as getting some new injectors what do think? any advice about this would be appreciated CHEERS . By the way the car is chipped and its only been a few monthe since it was set up on the rollers at Power engineering where the tester said everything is sound.

 

checked the cold start valve?

 

My cold start valve is disconnected because they run like shit with them connected.

 

Have you disconnected the cold start injector or the aux air valve?

 

That was what i meant i have already disconnected the cold start injector i typed down the wrong word (Valve). Most people, even when i took my car for a tune up at SCC performance in ST albans,Hertfordshire they told me the car will run better with it disconnected. Was wondering what is the AUX AIR VALVE and what does it do and where is it situated in the engine bay CHEERS

 

The Aux air valve allows air to by-pass the throttle when the engine is warming up to permit a higher idle speed. The valve consists of an electrically heated bimetal valve. When the engine is first started the valve will be open, as the engine runs the bimetal valve is heated which slowly closes off the aux air by-pass. This reduces the ammount of air entering the engine and reduces the idle speed.

A simple test to see if the valve is workingis remove it from the car and put it in the freezer for 15min. When removed the valve should be open, if it is reinstall it back on the car and run it for 5min. The valve should now be closed.

Its located on the back lower side of the inlet manifold (near the dipstick). A black pipe runs from the throttle body round to the valve then another pipe runs from the valve to the bottom of the inlet manifold.

 

Thanks for the info,ill have a look at it over the weekend.I have the Hanes manual and have been looking at it and found the thing you are talking about the real name is the auxiliary air device.So once ive taken the thing out and tested it like you said if it is closed when ive taken it out of the frezzer then bassically this could be my problem with the idling when started from cold. Can you still purchase these from Fords and would you have any idea how much it would cost? The other thing does it look like its kind of round in shape and have you had this problem before if so was thisaux air device the cause CHEERS Oh i was just thinking once ive removed the device from the inlet manifold is the valve visible or do i need to open it up.?