Put my new engine in (import wrx block still using uk 2000 heads) problem is I hit full boost then boost halfs itself until ecu reset but more worrying it pings on full boost wot)

Had a generic diagnostic done and he said maf was slightly low on readings, could this be causing loss of power (a focus tdci out accelerated me) knock sensor, map and boost sensor has been replaced, all vac lines are silicon and pill is in place, boost solenoid has been replaced.

Could a maf cause this?

I've ordered new inlet manifold gasket and throttle body gasket to rule out leaks, after this and maf change (should be here this week) I'm fresh out of ideas.

There is no boost leaks that I can find, changed to sti I/c and silicone boost hoses and still doing it.

It just feels like its 100bhp

 

Actuator is also so slack it would be impossible to overboost nearly (there is no tension on wg at all)

 

Got any codes flashing when u connect the black plugs under the dash? What boost are u hitting when all this happens?

 

Sorry should have put that, no no codes what so ever, hitting 1 bar, other engine same sensors hit 1.1 happily