Cm2350 high commanded vgt

[Carhauler]

(02-25-2021 )Rawze Wrote:  ... and what about that durashitter aftergarbage CAC. They are notorious for being restrictive as all h#ell and are known for causing turbo and intake issues.

high position is not unusual.. engine is trying to do a rapid warm-up cycle. - Its that turbo chuffing that you described that is an issue. Is the turbo still cuffing a lot?

also want to ensure the program in your ecm matches exactly the truck and engine... and that the turbo matches too. Might have the wrong exhaust impeller in it if someone has replaced the turbo in its past at some point.

Yeah not a fan of the crap on the front. But this started way before that was put on. This truck use to get 5.5-6 loaded 7-9 mpg empty hand calculated. Crazy numbers for a car hauler. Then all the sudden one day just started acting this way.

Turbo isn’t cuffing. Turbo is original. The program matches the serial number and is the newest version. Whole thing is odd. But watching insite, when I notice the commanded positions will spike then fall for a sec. as it does this the egr orifice pressure and differential will increase decrease.
The load percent, intake pressure, exhaust back pressure and any pressure or flow sensor will bounce around all at the same time randomly.
Thing drives me bonkers.

Everything else is great. Just keeps wanting a lot of egr. 10-20% at idle after the new cooler.