MK5 Golf GTI
All Things Mk5 => Mk5 General Area => Topic started by: fazi123 on April 24, 2017, 10:16:05 am
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Hi guys,
My cars got a misfire on bank 4, and I replaced the coil pack and it hasn't cured it. I can only assume it is the spark plug.
I'm interested in the NGK-BKR7EIX as they seem like what a lot of guys on here are running, but need to buy them today. I'm based in London - so somewhere close will be helpful :)
Thanks,
Faz
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More likely to be an injector than a spark plug.
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Eurocarparts sell them
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Eurocarparts sell them
Do you have a part number Rich? I haven't been able to find them when putting my reg in :sad1:
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More likely to be an injector than a spark plug.
What makes you think this? My symptoms are constant rough running when idle, and when trying to move. I've read another thread on here (I think it was @AJP (http://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=11926) thread) but his symptoms which were somewhat cured by refurbished injectors were seemingly different.
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Eurocarparts sell them
Do you have a part number Rich? I haven't been able to find them when putting my reg in :sad1:
You wrote the part number in your first post... just ring your local branch up and see if they have them in.
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More likely to be an injector than a spark plug.
What makes you think this? My symptoms are constant rough running when idle, and when trying to move. I've read another thread on here (I think it was @AJP (http://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=11926) thread) but his symptoms which were somewhat cured by refurbished injectors were seemingly different.
Experience.
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Injector 4 rough idle. Quite common for some reason.
If you want some of those plugs I've got a new set I can send out, but not until the end of the week.
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I managed to get a set of these NGK plugs yesterday afternoon :)
Pleased to say the roughness / misfire is completely cured. I've driven about 70 miles since the change and it's running sweet again :)
When doing the change, I did notice that spark plug number 4 (it was the one situated furthest right when looking under the bonnet) was burnt out. The other 3 still had some unburnt material on them so I'm hoping it was just this that was causing the lack of 'spark'/
Thanks for the offer @AJP (http://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=11926) - Much appreciated bud!
Thanks for your input on my issue guys :)
I'll be sure to update this thread if the misfire comes back anytime soon.
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Post a pic of plug 4. "Burnt out" doesn't sound very good at all!
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Glad things seem better for now @fazi123
But... (and I agree with Pud that this warrants further investigation)
Why's the plug fouled? Is it orange?
A knackered plug might be a symptom of an issue rather than a cause. Definitely post up a pic.
If you've been going lean on 4 a new plug is not the fix.
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Hi,
Please find pics to show what I meant by "Burnt out".
First 2 from the Drivers side of the engine - the tips are "cleaner".
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fp482%2Ffaz12321%2F23ED5C2C-BA37-4447-8C80-CD0B25CEF900_zpsmbzb5uzi.jpg&hash=34ab6648b903284c8af22efc056b9aa194125aab)
Second 2 from the passenger side show the 4th one with a burnt out tip
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fp482%2Ffaz12321%2F30843B1E-EE15-446B-9CCC-342972CF888B_zpsdkihxpld.jpg&hash=6dba4bfce8e955672fb7ca3a983dc9a639a8d899)
Let me know if you guys think there's anything untoward aside from one of the spark plugs being effectively "dead".
Just to add these are ~18k miles old and were put in about 600 miles before I went to R-Tech for a stage 1 when I had completed a full service with cam belt & cam chain etc.
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Are they OEM plugs or aftermarket?
Number 4 is oil fouled, which is explains why it eventually gave up sparking. I think that cylinder needs a compression test / inspection because it's burning quite a bit of oil. Hope it's not a broken piston ring land. Seems to be very common on the TFSI group these days, especially on Stage 2 and above cars.
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The current plugs are OEM or equivelant -
http://www.eurocarparts.com/ecp/c/Volkswagen_Golf_2.0_2005/p/car-parts/regular-service/car-service-parts/spark-plugs/?408441120&1&2a6c66423494a27daa7f10ccbb786e12bfddf13c&000301
This is what the garage (Audi/VW specialist) fitted when doing my service just over a year ago.
Would I have any other symptoms for a broken piston ring? It drives absolutely spot on and has been absolutely perfect aside from the day the spark plug gave up.
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Might not be a cracked ring land then if it's driving OK, but worth compression checking cyl 4 and comparing to the other 3. That cylinder is definitely burning more oil than the other 3 though.
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as promised I will update this when I know a bit more!
@Pudding (http://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=10733) you were right.... it was the injector. I had the compression tests done, and all 4 cylinders were holding the same pressure so that was a good sign.
I had all my injectors taken off and sent to Mr Injector (Thanks to an @AJP (http://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=11926) thread) and for £112 I had a full set of renewed injectors.
While it was at the garage I also had the carbon cleaned - The car feels SOOO much better for it. I picked it up yesterday and it was soo quiet I had to double check it was actually started :)
Thanks for all your help guys!
Faz
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as promised I will update this when I know a bit more!
@Pudding (http://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=10733) you were right.... it was the injector. I had the compression tests done, and all 4 cylinders were holding the same pressure so that was a good sign.
I had all my injectors taken off and sent to Mr Injector (Thanks to an @AJP (http://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=11926) thread) and for £112 I had a full set of renewed injectors.
While it was at the garage I also had the carbon cleaned - The car feels SOOO much better for it. I picked it up yesterday and it was soo quiet I had to double check it was actually started :)
Thanks for all your help guys!
Faz
Glad to hear it's all sorted. Injector faults seem to be getting more common as these cars get on a bit!