If you have an 87 and a Garrett turbo, then the wastegate has a actuator is connected by a rod to a lever just behind the turbine housing. The lever should be held by the actuator towards the compressor side of the turbo. when enough boost pressure is applied the lever gets pushed away from the compressor side of the turbo opening the wastegate.

Remember, boost helps build boost. So a large boost leak such as a broken ALDA line can kill all boost.

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green 85 300SD 200K miles "Das Schlepper Frog" With a OM603 TBO360 turbo ( To be intercooled someday )( Kalifornistani emissons )
white 79 300SD 200K'ish miles "Farfegnugen" (RIP - cracked crank)
desert storm primer 63 T-bird "The Undead" (long term hibernation)

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