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UrQ overboost.

My '83 UrQ has recently developed a little problem that first
showed up under heavy load, 2 passengers, foot to the floor.
The motor momentarily cuts out until I back off on the pedal.
I assume I was overboosting but now the problem occurs
with just 1 person in the car under moderate to heavy
acceleration. Is this a dead wastegate spring or an ECU
problem? The boost gauge reads 1.5 to 1.8 Bar before it
happens. Drives and starts perfectly otherwise. Help, please.

Andrew Finney
1983 UrQ, Eibached, Konied.