Hey Scotty my friend car won’t accelerate past 3000 rpm unless she press the gas pedal all the way down to the floor, she got 2 store codes p0300 and p0304, but with p0304 she already got her coil and spark plug and valve cover gasket replaced, fuel injector cleaned clean air filter, and a fuel induction service and still wont accelerate normal
Double check the work that has been done. Where the right spark plugs used? Are they loose? Are the coil packs the right ones? What about the wiring harnesses and connectors adjacent to the coil packs? And so forth.
Just because a job was done doesn't mean it was done right. Mountainmanjoe's checklist (linked above by InTrustWeTrust) is an excellent synopsis. Given that all this work was done recently, I'd go back and check all the recently done service, first.
