i checked already: -changed spark plugs (0.46 gap) -new spark wires -new coil -injector #5 when is at idle, does't show nothing the check engine, but the engine moves more than normal, after i drive it on the freeway, and i push the accelerator to get more speed, start flashing the check engine again (po305). please help
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Did #5 foul out again? If is misfiring like the the code PO305 says it is, did you pull that plug and take a look again? If the engine is shaking at an idle could be a burnt (ugh) valve or bad ring, and if tends to ping a lot you may be burning a piston. I suggest you do a compression test and see if it is a mechanical problem. R