Just realized my timing was off by 2 degrees on a 6.7 Cummins

I was chasing a rough idle on a 2015 Ram 2500 last month, swapped injectors, checked fuel pressure, the whole nine yards. Nothing fixed it. Then I got to talking with an old timer at a parts counter up in Boise, and he asked if I checked the injection timing. I had not even thought about it because the truck ran fine at highway speed. Turns out I was 2 degrees retarded on the cam sensor adjustment. Pulled the gear housing cover, re-set the sensor gap, and it idled smooth as butter. Made me wonder how many other jobs I have overcomplicated because I skipped the basic checks first. Has anyone else spent a ton of time on the wrong fix just to find out it was something simple like timing or a sensor gap?

2 comments

2 Comments

james_ramirez8d ago

I have definitely been there. Spent a whole weekend chasing a stumble on a 7.3 Powerstroke, replaced the ICP sensor, the IPR valve, even the HPOP. Turned out the plug on the ICP was just loose and not making full contact. Did you have to pull the whole fan shroud and radiator hose to get to that cam sensor adjustment, or is there a trick to it on the newer 6.7s?

mary_patel598d ago

Wow, @james_ramirez, you had to actually pull the shroud and hose just to look at a sensor?