hey folks it seems i have run into problems once again, after having a mechanic do my last timming belt it failed so I was forced to do a motor swap....again. After dropping the new "good" motor in i found it to have a rough idle, and to stall out after a few minutes it will rea vacume on the boost guage when I tap the throttle, and it has a miss at higher RPM's; It does have some small shampaign sized air bubles in the lines but i have seen worse run decent. I am wondering if what this could be. Would incorrect timming cause this kind of behavior?
The coolant is clean no oil in it which leads me to think its not a headgasket, but feel free to disagree.
Thanks
1SlowVW
PS: I am currently running turbo to open air, I don't make a habit of it but I thought i would point out that a plugged filter is not the source of the vacume.