2K High idle - any advice??

[lig]

Hi Chaps,

I know what your gonna say and i have searched the archives and found loads but nothing that has cured my problem...

It started a few weeks ago when the idle would be erratic and then the engine would stall, this then went away and came back again the other day. I read a bit in the bible about the coolant temperature sender, so i bought a new one and fitted it. Now i have the opposite, it idles at around 2k and then after about 30secs goes to normal (1k) but when driving it doesnt go below 2k so it feels like cruise control.

I have done the following:
cleaned stepper and checked that it is working (when i turn off the ignition it winds back in fully)
Reset ECU.

I am contemplating buying a new stepper but am not convinced this will work as it seems that there is just some delay in something telling the ECU that i am giving no gas?

I have also checked the coolant as it seems (coincidence) to be running slightly hotter than usual?? And also bled the system for air locks (there were none)

I dont know if it a suspect Coolant temp sender as i got it from a landy dealer and it is a 3rd party part??

Any ideas gratefully recieved...

Lig.

>> Edited by lig on Sunday 10th July 21:09

[barreti]

When you cleaned the stepper did you also dump a load of carb cleaner into the plenum?
You should see the crap that came out of there when I had it done. Carbon build up in there causes the butterfly to stick.
Bit of a long shot but worth trying for nothing.

[wixer]

Your throttle pot maybe faulty or not set correctly. Or you have a split vacuum hose somewhere, either from your dizzy or one of the breathers. Also check the plenum and base isn't loose. Disconnect your battery aswell, this will reset the ECU.