I recently had a similar problem where my truck's idle would never settle to the ~700 rpm range. It turned out to be my ECT sensor was constantly reading the trucks temp as too low; mostly around 150F even though the truck was warmed up.
I bought an Ultra gauge to read the temp directly from...
As a follow up I swapped out the ECT sensor and the high idle has been resolved. Beyond the surging idle the truck runs much smoother now. On the road she'll be between 190-205*F and idling at ~675 when warmed up.
Supercharged and Caesar, thanks for your help!
Can you tell me what you're ECT reads temp wise once you engine is warmed up?
I've had an intermittent high idle with the occasional hard warm start lately. After many searches and grabbing some info from my Chilton manual it looks like the ECTsensor plays a part in telling the ECU on whether...
I need to do mine, they look terrible.
What kind of wire brush did you use? was i the type that will fit into a standard 3/8 or 1/2" drill chuck?
Thanks!
It works!
Thanks for posting the write up! My trucks clock hasn't work in 20-30k miles - been driving me nuts.
i used an old plumbing trick to get the solder on the pin. Heat the pin then touch the solder to the pin not the knife.