SpeeD_TeaSe

About 6000km ago I changed my plugs, coils and wires and now I have a CEL P0302 misifre. Im not sure if I got defective coils or anything but why would I need to change my coils again? If I installed them wrong shouldn't of my CEL came on awhile back? Now after a long drive (40mins on highway) there is a loss of power, idling very rough and rpm unsteady going from 0,825 drop to 0.5 seems to struggles then kicks back up to 1.25 so any suggestions would help, my cat is also fine and I did the carbon removal about 3 days ago(CEL was on before)

nycgps

iTrader: (1)

nothing, that means you should get your engine tested.

ShinkaEvo

iTrader: (3)

Start checking from zero, replacing parts doesn't always mean it'll be fine.
Only means u got less possibilities those parts gone bad.
There's no perfect quality control

Bladecutter

I would first recommend removing the plugs wires and coils, inspecting the plugs, and then reinstalling everything just to rule out a poor connection first. See if that gets rid of the CEL.

If that doesn't work, then switch the coils from the rear rotor to the front rotor, and see if the problem stays with the rotor, or if it switches with the coils. If it moves with the coils, then replace those. If it stays with the rotor, I would recommend compression test the rotor, and pressure test the cooling system to see if there's a leak in that rotor.

BC.

SpeeD_TeaSe

Alright thx for your time guys, the CEL went away by itself then came back on it was a code for the gas cap so cleared it and if it comes back il probably replace the gas cap, springs might be done, also probably going to get a compression test to see, thanks again