Bucking Problems...Help!

[Kurt2002]

Ok guys, I have 02 GT with a S/C and Air to Air intercooler. At light throttle or cruising speed I have bucking problems. I also have them on decelerating to come to a stop.

I'm running two round bosch bypass valves and both are run to the power pipe.

I tried rotating the MAF and saw no difference. I disconnected one of the bypass valve and the bucking seem to get a little worse but could not really tell. No vacuum leaks that I can tell. I ran my hand around the lines while it was running and could not feel and sucking around the connects.

Well I was polishing my power pipe today, when i removed it I saw where the second bypass went in the hole was roughly 1/2" and the tube sticking out that the hose clamps on is roughly 7/8".
So i have a 7/8 hose trying to force air through a 1/2 hole.

I'm thinking because the second bypass hole in the power pipe was smaller than the hole on the second bypass, I have some restriction. Now because air will follow the least path of resistant it is possible that my second bypass was not working or not working to it fullest capacity that might of been some of my problems.

Need help guys

[HotPony]

i had a bucking issue, turned out to be my MAF sensor was getting some unmetered air, you won't be able to feel a vaccum leak, i'd just make sure all the hose clamps are tight, also, how far did you rotate the MAF? I saw if i rotated mine it was start surging, if i went the other way, the surging would go away and it would buck under mid throttle at cruise.. now i installed the powerpipe and made sure everything was tight, seems to be ok now, no surging, maybe a tiny bit of bucking but i do have a C&L meter.. I hear there's problems with those.