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what were the codes... I don't know what would happen if a MAP sensor failed, but maybe DME wouldn't allow boost. Datalog with the procede. drivable right, just no boost. thought I noticed you mentioned map3 when skimming... this is the no boost map.
For wastegate solenoids, probably want to check vacuum when both are connected and downstream between solenoid and wastegate. on start up wastegates should move from open to closed.
wastegate flapper cup or linkage to arm separated? the cup is 2 pieces i think.
Just throwing some things out there... but really don't know.
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