My main question is: how does the waste gate work? Is it oil pressure that forces the plunger to move the waste gate shut? The truck is lacking power and theres a bit of smoke coming out of the exhaust. The wastegate is operated by a spring and plunger thing inside what they are calling the pedestal which is the lower portion on the turbo. The turbo appear to have been replaced because there is a remanufacture plate riveted to it. HELP! I am working on a friends 99 E350 cab and chassis that used to be an ambulance.
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