help, all sorts of hesitation problems...jsut got this car

[Dub4Life]

i'm driving a 91 eagle talon....heres how it goes...

its worse during hte day than at ngiht. It feels like a whole bunch of timing is beiong pulled. Under slight or full acceleration below the boost threshhold...its bucks and jerks and all that nonsense. I jsut today uncovers a big exhaust leak in the exhaust manifol or gasket. Is this causing it? changed plugs....plugs arent fouled..checked today. It does this 90% of the time. And even once you reach boost...it still doesnt work itself out.....it jsut feels hell rich. i ahve hte walbro 255. stock injecotrs and stock FPR. Could the pump be over running the FPR? I dont get it. Was wondering if anyone had any input?

Thanks.

Jsut got the car. Before i bought it, it had, small 16g, intake, thermal exhaust, walbro 255, magnacore plug wires, Buchur UICP, 2.5" dp, high flow cat, MBC.

Sicne i've had it: New plugs, HKS 264/272 cam setup, cam gers, titanium springs and retainers, new rocker arms, KYB AGX's, sportlines, rear sway, suspension bushing kit, SAFC, 2nd gen maf

Ordering this week: injectors, FPR, and RR FMIC, Technomotive data logger
i knwo the logger will tell a lot when i get it, but could anyhting already done to the car cause this or maybe something jsut not working together right? Me and my friends been trying to deal with htis fora week or so at least. Just trying to get an ouside opinion

 

[w1kk3d]

Do a pressure test to find boost leaks.
Exhaust leak will definitely cause hesitation/bucking/jerking/etc.
Also check coilpack.

-jeff-