Jeep starts to flutter and runs down to 500rpm or so at first stop after starting the jeep and driving down the road Imagine when you let off the accelerator, all your boost pressure crams against the throttle plate and has nowhere else to go but back into the compressor housing of the turbo Its like it wants to shut off but doesnt.
A simple guide to BLOW OFF VALVE - VOLM
Learn what causes a blow off valve to flutter
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A fluttering blow off valve is one that is not adjusted properly The sound you're hearing is the valve repeatedly opening and closing because the spring tension is too tight The bov senses this sudden pressure spike and opens rapidly, safely releasing the excess air and preventing it from flowing backward toward the turbo The rapid “flutter” or “chatter” sound.
