07 cm870 metering/timing actuators/soleniods

[Cumminsher13]

(05-20-2024 )Rawze Wrote:  Just some thoughts on it ...

If it does not have a boost gauge, then install one. CM8780's are notorious for boost issues as the turbo arm/ controller starts to get sticky on them. If the boost is falling off or acting up, that could explain the smoke, etc. A 530HP CM870 should be roughly about 37 - 38 psi (38 max) boost sustained under full 100% steady operating load, optimally.

Run the overhead valve adjustment on it and then do an injector leak test on it after its warmed up, and has acted up a bit.
ref: http://rawze.com/forums/showthread.php?t...8#pid67948

Also, actuators can be checked as well:
ref: http://rawze.com/forums/showthread.php?t...619#pid619

I finally got some time to take the actuators apart and clean them out the first to seemed like the plunger had a bit more resistance to remove it from the coil and the plunger was loose like unscrewed….hmm and the plate seemed to be more scarred….the back 2 seemed fine to my eyes….but everything back together to the best of my abilities and now the truck seems to have a bigger miss….was I supposed to tighten the first 2 plungers? Heeeeelp