Peterbilt 2015 cm2350 list of issues

[tree98]

You need to get the cummins insite program so you can do a proper injector leakdown test.

Pressurize the entire engine by loosening all the valve rockers, then blocking off both sides of the turbo and putting 35 psi of shop air in through the turbo inlet temp sensor. A lot of issues can be found this way.

You also need the c a l t e r m program so you can see what has control of the fueling.

Does it feel low on power even if the fan isn't on? Another thing insite will show you is if the a/c system is commanding the fan on due to a bad switch.

Your coolant and oil temp both seem a little low for 130k pounds gross. The ECM might be holding back fuel because it's in a silent derate. Again you'll need c a l t e r m to see if that's happening.

If you fill your fuel tank up but not your def at the same time you'll trigger a silent derate as well.