Cummins ISX15 never ending check engine lights

Yes, Cummins Tier 3 is involved, they are instructing shop to pull all injectors at same time and inspect, that was initiated today

 

Motor runs fine when the codes are cleared, so that comment makes no sense

 

They are pulling injectors to see if there is any debris in the micro screen on the inlet

 

Status update, truck will not complete injector performance test on Insite, aborts test about halfway through test(around injector 3 or 4 test 2 or 3). Shop decided they would not troubleshoot any further as they viewed the problem as unsolvable. I have another tech from Idaho doing some research to determine if this shop followed ALL protocols from Cummins Quickserve Diagnostic Procedure. From my observations while at the shop, it seems they skipped over some, when I asked about fuel flow measurement results on various steps in the Cummins Quickserve Test Procedures, they could not give me the results as the levels were not measured and logged, or possibly not performed. Watching what the tech was doing over and over, was like a dog chasing his tail because he could not pinpoint the root of the problem

 

$1800.00 more spent to get truck back in my possession. Current codes are 1139,1144,1911