All Things Mk5 > How to Guides / Troubleshooting
Spark plug colour
Ash_89:
I have been getting a misfire/spluttering on wot recently, the throttle turbo pipe is also potentially leaking at the seam.
I’m assuming the dark plug is from carbon fouling as the plugs before Xmas were all uniform in colour
Plugs Ngk bkr7eix
Ko4 tfsi
Stage 2+
pudding:
The left one could be a bad injector, dribbling rather than spraying. Quite common. The other 3 look normal. The white crusties look like ash deposits from burned oil.
Ash_89:
@Pudding Funny enough I was going to send the injectors off to Aks tuning within the next few weeks, fitting a new set of BKR7EIX plugs today aswell.
3 out of the 4 injectors are original from new so they have done well to last 2 years at stg2+.
pudding:
Try running a few tins of LiquiMoly injection cleaner through it mate. That stuff totally cleared up a stumbling idle and part throttle on mine.
Ash_89:
Yeah I’ve seen a few company’s doing gdi injector cleaner
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