Quote:
Originally Posted by Murlo26
But I doubt that is it, since the second pump shouldn't turn on until you hit boost right?
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The second pump should be off within one second of the car dropping below the boost thresh-hold. This is the primary 255 misbehaving, for whatever reason.
It could still be a backflow issue or something with the suction/return line but it seems less probable than a bad Walbro.
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