07 kenworth t800 750,000 miles
Cummins ISX 18 speed
I’ve searched all the threads and either can’t find it or missed it with same problems.
jake, high idle and cruise only works when engine bay is cold/cool. After 25 miles down the road they stop working. Switches are still lit. Had the mechanic check switches and said they can all be operated via computer.
is there a relay or solenoid somewhere we are not seeing.
I feel like the problem was intermittent when it first started and has gradually came to where it is now.
There is a call into the Kenworth tech… been over a week with no answers found.