Misfiring issue P0303

[paul6316]

Engine management light came on after a bit of hard acceleration and then car (K1 2008), started to misfire. Quick scan brought up P0303 so I changed all four coil packs and expected it to be fine but it wasn't. Car was running really badly and using a load of fuel so took it to my local garage who couldn't solve it and put it down to a faulty Ecu so they got that checked but its fine. They are not very hopeful of finding what it is and say I should go to the main dealer.

Car gas a Revo stage 1 map and was fine up until this ECU came on.

Any suggestions before I bite the bullet and go main dealer?

 

[Ghostface]

It seems to be cylinder 3 so you've tried coil pack, not spark plug? Try that if that's not the issue get injector 3 looked at. A few threads I've read people's misfire mostly ended up being the injectors dirty or faulty.

 

[paul6316]

Thanks for the quick reply, plugs has been checked so injector next?

 

[paul6316]

reports back from the garage are that it is most likely the injector and they are stripping it out to confirm. They have attempted to source a replacement but have been told that they are on back order at TPS with no due date!! Anyone have the part number or know where i could find it?