No jake or cruise after engine bay is warmed up

Discussion in 'Trucks [ Eighteen Wheelers ]' started by wilmes family farms, Jul 6, 2022.

  1. wilmes family farms

    wilmes family farms Bobtail Member

    2
    0
    Jul 6, 2022
    0
    07 kenworth t800 750,000 miles
    Cummins ISX 18 speed
    Vin# 7j206883
    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.
     
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. spsauerland

    spsauerland Road Train Member

    4,213
    10,683
    May 31, 2010
    West Harrison, In
    0
    Does your "mechanic" have Cummins Insite or tool to monitor switches?
     
  4. wilmes family farms

    wilmes family farms Bobtail Member

    2
    0
    Jul 6, 2022
    0
    He can make them switch on and off. Also monitor them he said. He said they were alll working. Are there any switches in the engine compartment that I could check. The clutch, brake, cruise and accelerator all work like they should when started.
     
  5. spsauerland

    spsauerland Road Train Member

    4,213
    10,683
    May 31, 2010
    West Harrison, In
    0
    So they all are working correctly when the Jake or high idle won't work or only checking when they work?
     
    Bean Jr. Thanks this.
  6. kwcam

    kwcam Light Load Member

    176
    133
    Dec 29, 2012
    at the shop
    0
    Co worker had a similar one that turn out to be a poor pin contact at the ecm plug, every thing worked find till it warmed up then quit. New pin in the connector fixed it.
     
    spsauerland Thanks this.
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  • Draft saved Draft deleted