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Super Moderator
Join Date: Jun 2004
Location: seattle, washington
Posts: 6,775
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that rubber hose that comes off the banjo bolt (circled in your photo) ends up as one of the three hoses that connect to the cycle valve. that hose is important because it controls the wastegate. if it has an on/off switch it seems someone was playing with the boost. i would not advise turning that off, as your boost will spike and you'll damage the motor.
do you know what modifications were done to the motor?
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'89 turbo-s (2.7, wolf3d ems, garrett dbb turbo, tial 46mm, etc. fast!)
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