Sorry just had too many guesses.
ok heres everythin a think you need to know
Subaru rb5
maf replaced 5 months ago
turbo replaced 3 months ago.
Car starts begins to idle but then starts popin and banging. no engine management light. tried to rev the car it just pops in bangs. revs go mega low. unplug the maf i am able to drive the car,
hes a short video. tried switching dumpvalves with a car a know that works.
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thanks.