Not sure if posting in the right place but here's my situation. 98 civic ex d16y8 turbo. Just had the turbo put on and tuned a couple weeks ago and only drove it about three times not hard at all because I was told I would need head studs. It ran perfect on all 4, ran strong and sounded great before I pulled it into the garage. This week I replaced the head studs with arp's, new head gasket, intake gasket, head was resurface and cleaned, fresh oil and antifreeze etc. I got everything back together and started it and it was running like Shit. Started off with pulling the plug wires one by one and cyl 3 when pulled the idle didn't change, unplugged the injector on cyl 3 and the same. When I listen at the exhaust it sounds likes its choking kind of like a pop every second. Also vacume its sitting about 18. It did not sound like this or run like this before .What did I forget to do or mess up or not plug in? Any ideas or any diagnosis I can do to root the problem ? I would check all data for diagnostic procedures but not sure if it would be the same with having after market parts on. Any help or ideas where to start would be great !! Thanks !