First. You have to get it to idle..
Do you still have PCV attached and the oil fill tube hose attached to the throttle body? Do you have a breather or an oil cap on the filler tube?
Set your base fuel pressure to somewhere in the mids 30's (set it there with the FPR vac line disconnected and reconnect it when done adjusting). 30# injectors can be tricky with idle quality higher than that with the stock computer. See what happens.
Then carefully clean the maf with some MAF cleaner and set your timing back down to 10.
Does it idle yet?
Look around here or google for the base idle reset procedure and clean the IAC if needed.
Once it idles at conservative 10 timing, start working on the breakup under load..
Is it missing before or only when actually making boost?
What do the plugs look like, are they almost new and are they plain old copper plugs (should be) and what are they gapped at (important with boost, should be somewhere in the 30's to start).
Other things to consider and I'm just throwing these out there. Double, triple, and quadruple check your firing order and wires. Seems redundant but it happens more than you think. Maybe your harmonic balancer outer ring shifted and the timing marks are off and maybe shaking the engine and not really a miss at all (again, it happens and can be confusingly similar). Do you have good fuel and filter? Plug wires good and not all crossed up and leaking? Unfortunately you may have inherited something with internal unknowns.
Everything above can be done with little to no money. I'd start with looking at and checking that stuff before throwing random parts at it.
Last edited by nolife; July 26th, 2010 at 04:49 PM.