High idle 940 B230FK
Idle has managed to go high on my -98 lt, approx. 12-1500 rpm.
Has followed a bit of extra with the last time and it's after the engine has gotten hot and I've driven a few miles, and then it seems like it goes down to normal rpm when the car is standing still/wheels not turn. Otherwise it starts okay and normal, no cheating electricity The damper housing, lmm, idle engine is cleaned and tps "clicks".
Air mass sesnor
Temp sensor for ecu
Throttle pos. switch
Vacum hoses on intake manifold
Abs/speed sensor on rear axel
Cleaned up throttle house
Repalced the ecu with an used on with new ecotrim chip inside
When I shut og the engine and start it up again the problem is not there until the car has been shut of for aprox. 6-7 hours, depend of the outside temp. The problem seems to increase when outside temp is low from aprox. +5 C and lower. The problem comes after driving to the engine temp gauge shows about 1/4 warmed up.
In the winter time when I use the electric engine heater (230 V ac) and the engine i a little bit warmed up the idle is normal.
It is a very old thread on this forum were the car is acting exactly like mine.
Hope there is someone who can help with this irritating issue.
Last edited by 98945lt; 01-16-2018 at 12:59 PM.