Freightliner M2 with Cummins ISC 8.3 uneven idle, won't rev.

[mikkhh]

(08-08-2025 )DVT873 Wrote:  So it went to hell after you put in the injector codes? The Internationals I normally work with don't use injector codes, so I know little about this. BUT if it won't run on the correct codes, maybe somebody HAS messed with the programming. Any chance of putting the origional codes back in and seeing what happens?

Whose injectors? Quality is all over the board on injectors in general. I wouldn't trust anything except Cummins or maybe Bosch.

Truck manufacturer or cummins remans I would trust. But some dealers in my are ask core charge for even new parts.

Have had bad experiences with Bosch reman diesel injectors. One (from set of six) piezoelectric injector electrical side failed 1.5 years after installation. Warranty was only 1 years. So money down the drain. Bought another bosch reman injector to replace it (was in stock at parts store) - but sadly it fas faulty direct from the store, again electrical side defect. After that bought used from junk yard for 1/3rd of reman injector cost, since I needed something to drive with along the warranty time. It took 6 months for them to finally aknowledge it was faulty and issue me a refund.