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Boost problem on 850 T

Recently, I have only been getting 4-5 PSI max, with the occasional spike of 6. Normally I push around 14 with 16 spikes. (No MBC)

I have checked all the obvious vac. hoses and I cant hear/see any leaks.

I recently had my radiator replaced, tranny and coolant flushed and a few little vacuum elbows replaced. I was doing fine for a few days after that though, so this is pretty recent.

Any ideas on where to look?







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