Intermittent boost loss

[Rawze]

signs point to turbo over-working itself.

start by pressurize the whole engine (front of turbo) to back of turbo/exhaust outlet to 30 psi and find the cac and other air/egr circuit leaks.

that or test CAC, then intake, and exhaust/egr.

maybe something wrong w turbo?

need re-calibrating? -- hanging up?


anywas, signs point towards air/boost problems.

air/egr-gas/exhaust related issues will throw codes down at the aftertreatment system.

ALSO. make sure your filters pass a flow-test.

and inspect for the infamous 'volcano' (ref: http://rawze.com/forums/showthread.php?t...07#pid1807 ) and inspect the SCR element for face buildup... that SCR canister element face should be clean as a whistle.