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I would drop by sercret services and see if those cats can give you some advice. Vaccum leak, need to reset ECU, look at your wastegate, make sure it is working and then proudly go to the shop and ask.
At this point, it could many things..
Systematically check:
Wastegat.
BOV
Clean oil and lines
Vac hoses, all of them.
Drain your fuel and replace. (bad gas)
Fuel filter.
Fuel pump pressure.
Fuel lines.
Injector voltage.
ECU reset.
Intake gasket (spray starting fluid at the manifold contact and manifold runners while acceleration under the hood and see (possible pourous intake leaking)
Compression check.
Throttle position sensor (look for 10 to 12 ohms resistance)
Bad battery cables.
Bad alternator. (Engine could be starving for spark)
Exciters and ignitors. Make sure they all work.
That is as far as I can go on the web.
Look at all of it.
You may even have some bad plug wires...it gets multifaceted in troubleshooting.
Anything you don't think of could be a simple culpret.
Do the checks.
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