ghostid16

I have a 2006 Audi A4 Quattro 2.0 turbo FSI, with 105,300 miles on it. It is throwing codes p0300, p0304, p0303, and p0301. i recently changed the spark plugs and coil packs and injectors. with changing those 3 nothing has changed. Car barely runs at idle and most times will die out. If you give it throttle it will stay running. If you throttle up and give it a some what of a high rev it will backfire and pop. i cant seem to figure out what else it could be.

So far i have done:
oil change
air filter
spark plugs
coil packs
Injectors
gas cap
canister purge valve
camshaft oil control valve
intake manifold gasket
valve cover gasket

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