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

Now that you mention boost….it does have a boost gauge and I’ve never really noticed a problem with the boost but I do know that the turbo air control valve under the air compressor is leaking a bit of air on the top side idk what effects that would have