i know a few of you have posted about high idle/surging so i thought id post my findings.

 

had done all the usual several times ( clean TB's, reset then replaced TPS, cleaned then replaced engine temp sensor & harness etc), but still had an idle that would suddenly jump up to 1500rpm.

 

took the plunge & removed & cleaned out the idle control valve.

 

it was a bit of a git to remove as its quite tight at the back of the plenum (pass side). not too bad but if your gonna take it of get a new gasket first. mine broke up & i had to make a new one!!

 

once it was off i could see the electrical contacts were very corroded, i think this was prob most of the problem with mine, cleaned them up.

while it was off i also stripped it down, quite a bit of carbon deposits in there. (again take care if doing this, theres small springs & plungers in there ;)) cleaned them all up with carb cleaner and a little wet & dry on the plungers.

 

put it all back together & the idles spot on now :)

 

if it stays like this i'll be a happy bunny :D

Am planning to have the plenum off mine this weekend, may try this, along with the water by-pass and the pcv valves. I know you can do all that with the plenum on, but I am a lazy sod :)

Paul, where is this valve? Have you got a pic as this is one of the few things I haven't tried on mine yet.

 

Ivan

Paul, where is this valve? Have you got a pic as this is one of the few things I haven't tried on mine yet.

 

Ivan

 

heres where its situated to bud http://www.twinturbo.net/ttnettech/iaa/iaa.html

;)