hello guys,
i have a honda civic 07 hybrid. i have changed spark plugs and cleaned throttle body. but after 2 days the check engine is on.
Do i need to reset the ecu following the replacement of parts? If yes what do you recommend? Remove ecu fuse or remove battry cable?

 

You will need a scan tool to reset the CEL on something that new. While you are at it pull the codes and find out why the CEL is on.

 

Hello...having p0303 code...cylinder 3 misfire..but i have already changed all spark plugs :/ any idea what can cause this error? The car starts to lag and stumbles on acceleration

 

Could be a whole slew of things. Might want to seek a local professional that can put their eyes on it.

 

If it’s really only misfiring on one cylinder than more than likely it’s your ignition coil on that cylinder. Because if it was fuel related, well it could be your fuel injector on that cylinder but it’s less likely than the ignition coil. Probably isn’t your fuel pump or you would get misfires on more cylinders.