Issue: When at highway speed, if I let off the throttle I loose all power. I can shift thru all gears just fine. When I let off the throttle I get all smoke and no response and sometimes backfires. Have checked and reset the turbo actuator. Replaced ECM, and replaced the fuel solenoids and the TPS.
Cummins ISX
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by timenowover, Mar 4, 2024.