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ENGINE PLATFORM
Cummins ISX / X15
Cummins ISX and X15 are found across multiple truck chassis. EGR valve sticking, injector cup erosion and VGT lag are our most common diagnostic targets.
SYMPTOMS
What you'll notice
Tell-tale signs the Cummins ISX / X15 is asking for attention.
- EGR position / actuator fault codes
- Coolant in oil or coolant loss
- Boost lag and black smoke under acceleration
- Engine derate at altitude or under heavy load
DIAGNOSTICS
How we find the fault
- 1
Insite OEM scan
Read active and historic fault codes with full snapshot.
- 2
Cylinder cut-out test
Identify weak or misfiring cylinder via power balance.
- 3
VGT actuator sweep
Command full vane stroke and verify response time.
- 4
Coolant pressure test
Cold pressure test to locate injector cup or head leak path.
TYPICAL REPAIRS
What we fix on the Cummins ISX / X15
EGR valve & cooler service
Replace EGR valve, clean or replace cooler, reset adaptations.
Injector cup repair
Pull injectors, replace cups, machine seats and pressure test.
VGT actuator / turbo
Replace electronic actuator or full turbo, calibrate in Insite.
Common faults at a glance
Quick reference of the issues we see most on this platform.
- EGR valve sticking
- Injector cup erosion
- Variable geometry turbo lag