MK5 Golf GTI
All Things Mk5 => Mk5 General Area => Topic started by: neo_ed30 on November 22, 2023, 12:40:26 pm
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Hi Guys,
Recently picked up an ED30 with 53k miles on the clock, will upload some pics soon.
This is my first car so I'm very new when it comes to cars.
I was having a really bad misfire on cylinder 3 so I opted to replace the spark plugs and coil packs. Unfortunately the car was still misfiring on cylinder 3 (not as bad). The next day when I was driving to the mechanics to have it diagnosed, the misfire disappeared and has been gone for the last 2 days. Is this something I need to worry about?
Could it be due to the engine temp as when I tested it after replacing the spark plugs and coil packs it was cold whereas once I got to the mechanics it was up to temp?
I have it booked into r-tech for all the preventative maintenance bits (dv, pcv, balance shaft delete, cam follower, pick up pipe, sump clean, service) as it hasn't been serviced for 2 years (5k miles), maybe the misfire had something to do with that and not the spark plugs/coil packs?
Thanks
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Welcome. You may have an intermittent fault with an injector. R tech can clean/test them
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If it only misfires at idle/low rpm and when hot, but is fine when driving, that is classic injector failure.
At 53K it's unlikely to be anything else, although the injectors normally last to 80-100K, so maybe it's led a gentle life, which isn't the best treatment for a GTI engine. They like lots of heat and regular use.