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[Y-TRY]

I used 5/8 line on mine for both the supply and return, seems like I remember someone on another board with a similar problem bacause of a too small return line. Also I have my boost reference line coming off the intake pipe just before the carb hat so I dont have any vacuum going to the regulator. If your problem goes away with the line disconnected, you might try plumbing your boost reference line before the carb and see what happens. I have heard there is a pressure drop of a lb or 2 because of the carb and I thought it would be better to sense boost pressure before the carb than after to help insure the fuel pressure rises high enough to supply the carb properly. Going lean under boosts not a good thing. Hope this helps.

Mike

Hmm. Got me thinking: I have my boost refrence tied in at the hat. There is a "T" from the hat and the other side of the "T" goes to the line running from the baseplate, which I believe pulls vacuum much of the time. Makes me wonder if the vac. from this line is sending weird signals to the regulator. So the reg is almost actually reading from the baseplate instead. Hmmmmmm.