MK5 Golf GTI

All Things Mk5 => How to Guides / Troubleshooting => Topic started by: lee_plum on March 06, 2014, 09:03:02 am

Title: Misfire :(
Post by: lee_plum on March 06, 2014, 09:03:02 am
I'm getting a misfire on cylinder one, checked the spark plug and was very wet with fuel, changed all four coils, no difference, changed the sparks plugs and misfire was cured. 2 weeks later misfire, back on cylinder one again, checked spark plug and found wet again. Changed it again and it went away and ran fine for a couple of weeks and now the same fault again. What could be causing these plugs to fail so quickly? And only on cylinder 1 it seems.

The injectors I got brand new and aren't even a year old
Car has k04 conversion with shark remap, could this be an issue with the map

Any help would be appreciated
Title: Re: Misfire :(
Post by: bacillus on March 06, 2014, 09:51:56 am
What mileage has it done?
Title: Re: Misfire :(
Post by: lee_plum on March 06, 2014, 10:02:04 am
120k, checked compression, seems to develop when car is left idling
Title: Re: Misfire :(
Post by: GTIKKM on March 06, 2014, 09:12:31 pm
If plugs are new and coils are new and your getting wet plugs.. it points to the injector being faulty (possibly dumping fuel instead of atomising or just leaking in general)
Title: Re: Misfire :(
Post by: fab5freddy on March 06, 2014, 09:50:56 pm
I'm getting a misfire on cylinder one, checked the spark plug and was very wet with fuel, changed all four coils, no difference, changed the sparks plugs and misfire was cured. 2 weeks later misfire, back on cylinder one again, checked spark plug and found wet again. Changed it again and it went away and ran fine for a couple of weeks and now the same fault again. What could be causing these plugs to fail so quickly? And only on cylinder 1 it seems.

The injectors I got brand new and aren't even a year old
Car has k04 conversion with shark remap, could this be an issue with the map

Any help would be appreciated


Exact same thing happened to me, faulty injector. Mine was only about 6 months old also  :happy2: