the more i understand it the more chance i can sort out my car how dose the boost solenoid and the other little gizmo next to it effect boost fuelling etc.. if there is any links that anyone knows it would be much appreciated

 

The boost solanoid valve has been mentioned widely on this site as it is prone to sticking. I have a 97 classic which cut out momentarily on full throttle.this was because the previous owner had it overfilled with oil and it worked it's way to the switch . Symptoms ( other than cutting out ) include a sound similar to someone blowing across a bottle top or a cow mooing !! Mine made exactly that noise at about 3000rpm .As for fixing it ,i've read cleaning it with brake cleaner works but I did that twice to no avail .From your previous post re cutting out this could be the cause

 

When cleaning it you have to make sure it is plugged in and your car is in diagnostics mode (so it is activley pumping) by connecting the black and green connectors under the steering coloumn.

I used carb cleaner to clean mine then gave it a squirt of WD40 when i was done- works a treat.

Craig

 

i have a year 2000 classic and understand that the boost solenoid clicks on tickover but my one dosn`t is this correct
thanks

 

Not sure i've never listened for it.

Put the car in diagnostics mode it should defo click then.

Craig

 

You're right although despite my best eforts I never managed to find these 2 wires under the dash so did it with the switch off the car. If you can help I'd (we'd ) be grateful.
97 classic

 

If the wires have not been used before they will be taped up into the loom.

It will require you to look under the dashboard near the steering column with a torch to spot the wires. (2 Green 2 Black - Unplugged) you need to pull them away from the loom and connect them together then turn the ignition on.

You will hear the fan blowing and see the "Check Engine" light on the dash flashing when it is done.

Craig

Pic here

http://www.scoobypedia.co.uk/uploads..._connector.gif

 

You're a star . I've had this on and off for several months and Yoga's not one of my favorite pastimes

 

apperently it is the 2 two green connectors under the dash you put together and then the solenoid should click well mine dosn`t i dont know if this is to do with me having a link ecu and thus the joining the two connectors is useless

 

I not sure about the link ECU you may be right - You'd probably be best asking a link mapper.

Craig

 

I take it ,it's black to black and green to green is it ?

 

Yep

 

thanks for your help i have asked bob rawle if anyone can put some light on this he can

 

so dosn`t anyone know how the boost solenoid works

 

It vents pressure at the wastegate back to the inlet, keeping the wastegate shut and allowing higher boost pressure. It pulses open and shut to maintain the target pressure.

Without it, the wastegate would open at its set pressure which is about 7psi, as opposed to the 14psi it would run with it working.

If its stuck open or leaks, the car will overboost and you will encounter fuel cut (ECU engine safeguard).

 

What will happen if you clean it with out plugging the black and green plugs

 

The same thing that happens when you turn on a light with no bulb in the holder .... nothing

 

Ok cheers for that, will have alook under the steering rack before i clean mine.