Cylinder 1 misfire :-(

[mk4gti-t]

Earlier today i suffered what i thaught was a misfire. It only happens on WOT and under load. Scanned for faults and the only ones that came up were to do with the flapper motor issue that i already know about. Ran some logs and found cylinder 1 misfires. Possible causes? I'm thinking plug and/or coil pack. Anything else i should be looking for? Also this might sound like a stupid question but which is cylinder 1? I'm assuming it's the far left cylinder. Cheers.

[Saintsteve]

Injector is another high possibility as these cars seem to be suffering with injector missfire and un-smooth idling issues , anything over 60k miles , then add that to your list of possibles.

Number 1 will be nearest the cambelt.

[GrayMK5GTI]

Cylinders  3&4 are most common for misfires as they are closers to the PCV so get the most gunk coming in.

Try spark plugs first as they are a cheap fix, maybe swap coil packs around to see if the fault moves with the coil.

Worst case as Steve said is an injector 

[mk4gti-t]

Cheers for the advice. Ive ordered a set of NGK BKR7EIX so hopefully that will sort it out. By the way i'm currently running some nology plugs that i brought off a member on here. Only read bad things about them since i fitted them 

[Tfsi_Mike]

It's recently come about that nologys are no longer recommended for our cars 

[mk4gti-t]

Plugs cleaned and gapped as it looked massive and running better than ever now. I've ordered some new ngk iridiums though as these nology's are a bit suspect now. Cheers 

[Tfsi_Mike]

  just reminded me that backshaft motorsport charged me £65 for gapping my spark plugs 

Found my feeler gauge since

[rich83]

  just reminded me that backshaft motorsport charged me £65 for gapping my spark plugs 

Found my feeler gauge since

Jokers. 

[audiman]

  just reminded me that backshaft motorsport charged me £65 for gapping my spark plugs 

Found my feeler gauge since

Wtf!

[Tfsi_Mike]

Arseholes