Cm870 drivability woes
03-23-2026, (Subject: Cm870 drivability woes ) 
Post: #4
RE: Cm870 drivability woes
STOP fighting garbage programming...

FLASH the ecm back to its original factory programming that belongs in that engine according to its ser# and unplug the egr temp sensor. This will let it run correctly,.. no 'TUNE' needed.

ppl have driven CM870's a million miles like that without any issues or power/torque derate whatsoever. CEL light will be on, but this does not cause any issues. - Boost will also be slightly less 32-33 psi or so, but that is fine,.. does not hurt it or take away its power//torque output.

... run it that way for a while so that you can isolate all of its issues and get the engine back right mechanically... running really well. Get a base-line of how it should run... and fix any issues that it may have.


User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!.
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RE: Cm870 drivability woes - Rawze - 03-23-2026



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