Another low power isx870

[Rawze]

(10-17-2023 )Titan313 Wrote:  ...
I’m in the Detroit area and don’t know anybody that tunes these trucks.

- Air boost controller is most likely original with engine
- Muffler is a couple years old. Muffler delete likely soon.
- The ECM from this engine was automatic so we could not use it.
- Recent tune up and injectors done last year , I’m really leaning towards a ECM issue
- Check engine has always been on.

If you need someone to help you with CM870 programming specifically, then forum member 'running rough' is the recommended person on here for that kind of thing.

He owns his own trucks, helps others remotely, and has been well trained with all things that are CM870 related, including their particular quirks, etc.

You did not mention the boost levels, so I can only assume you don't have a boost gauge installed. - If so, then that is something else that you need to cure right away, especially for that CM870, as they are known to have a bit of a wonky turbo to begin with.