Medium and Heavy Trucks
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Hi Christopher, My name is***** you still loosing coolant and have white smoke or has all that been fixed and you just have a stumble? Any fault codes?
thanks for the update. Monitor your fuel pressure and install a clear hose to see if there are any air bubbles indicating you are sucking in air. If it checks ok and the EGR system tests good, the turbo and actuator are good, the problem is likely a faulty injector with a mechanical problem or damaged injector o ring.
Have them tested with Cummins Insite...
Between the tank and pump on the suction side..... Then also on the return
The connectors only go one way unless someone played with the harness however it shouldn't matter which way. I do not believe they are marked either.
That is correct. The older ISX's have 2 fueling and 2 metering actuators with the fuel shut off in the middle. Your ISX15 does not have this setup. Where are you with this currently?
The ISX15 is common rail but I would have an injector test and a cylinder performance test done with Cummins Insite connected. Cummins Insite is the best troubleshooting tool to use on the ISX 15 as well as some specialty fuel system test tools for the fuel system but a large number of tests can be run through Insite. Do you have access to Insite?
Tanks for the update. Most commonly it would be fuel related or EGR system related. Check for a soot or carboned up EGR system. Clean out the piping, etc. Then monitor fuel pressure and boost to see what they are both doing when this happens... If all ok and after the EGR cleanout I would do a regen and then see if the symptoms come back. If so I am leaning towards injector troubles.