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ECM may send incorrect fuel/air mix
Fits 3789468 For Cummins Engine ISB6
It keeps the air system at the correct pressure level (usually 90–120 psi) so the brakes always have enough power to operate
Rough Idle or Misfiring
Q21-1077-3-103 | Genuine Paccar® Chassis Control Module MUX3 Evaporator ECM may send incorrect fuel/airDescription: A Chassis Control Module Q21 1077 3 103 (CCM) is an electronic control unit in a vehicle that manages and coordinates systems related to the vehicles stability, handling, and ride comfort. It acts as the brain for chassis related functions. Part Number: Q21 1077 3 103 Condition: Remanufactured Manufacture Brand: Paccar Related Part Numbers: Q2110773103, Q21 1077 3 103 Fits Q21 1077 3 103 For Kenworth T680, T660, Peterbilt 567, 579, 389
