hey all, i have searched many threads for any ideas on this fault. I have no fault codes or warning lights on, yet my boost guage reads 5psi, heres the odd thing, when using a snap-on scanner to monitor actual vs desired boost it seems to think i have 6 psi boost (actual) but desired is 7.4psi so this would suggest its not in limp mode. So next i blanked off the wastegate actuator pipe to see if the turbo mechanicals are up to the job, boom 10 psi with light easing of the throttle, it would go much higher but for obvious reasons i was very careful. The n75 tests out ok, but i still swapped for a known working unit but the fault remains, same thing when i tried a known working MAF sensor. The only known faults i have are oil level sensor warning, rocker cover leak the back half moons, and lower dipstick tube, these became apparent during a smoke test for boost leaks, all piping and vacuum lines are ok. Any ideas, thanks in advance.