One overlooked item people miss is the BBV or boost bypass valve. If you spray carb cleaner up into where the rod actuates you might find the diaphragm could be the cause, you would see you fuel trim readings change when you spray at the base of it.
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One overlooked item people miss is the BBV or boost bypass valve. If you spray carb cleaner up into where the rod actuates you might find the diaphragm could be the cause, you would see you fuel trim readings change when you spray at the base of it.
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