MK5 Golf GTI
All Things Mk5 => How to Guides / Troubleshooting => Topic started by: jedi-knight83 on December 28, 2011, 05:33:13 pm
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Background... Car is 2005 58k DSG. Stage 1 remap.
Drove down to Somerset on saturday no problems. Ran low on fuel and only fuel around was morrisons regular unledded so I put £20 of that in to get me the rest of the way. Did about 50-70miles on that and then parked it for the weekend and didnt use the car again till tuesday night at midnight when i drove home.
First thing I did was filled up with V power and then with nice empty roads I set the cruise to 85 and stayed doing 85 for about 2hrs till we hit 50mph road works... slowed down but had it in manual so stayed in 6th.
Accelerating out of the road works in 6th it then started getting strange!
-There was loads more intake noise... it sounded like my mates twintake. Ive just got a normal air box set up and has never heard it that loud
-There was hardly any power and the revs were jumping up and down a bit when i accelerated rather than a nice smooth increase like normal
We were almost back at Enfield to drop my mate off so I just came back slow. Had a look under the bonnet to see if any obvious pipes had come off.
I decided to head home anyway and see how it went... pulling out from my mates there was still loads more intake noise than I am used to... pulled up to some traffic lights and there was then a strange, reasonably loud pop / bang .... it sounded a bit like a bit of hollow metal being dropped. Bearing in mind its now 3am and no one is about I guessed it was a noise from my car. I thought a bit of my exhaust had falled off so I pulled over to check but it was all fine...
Got back in to drive home again and all of a sudden the car was fine... plenty of power again and in 6th from 60mph it pulled nice and smoothly now.
I still think the intake noise is a bit louded but not as loud as it was in the short bit of the trip where the power seemed to vanish and the revs got all lumpy.
Took it to the garage today and there was an intermittent fault logged with the air intake / injector... I'll try to get the proper fault code tomorrow and post it up.
Anyway... little bit puzzled now!!
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long shot here mate my car did nearly the same but with out the load bang you heard, I found that my oil filler cap had came loose, my revs were jumping it was luggy, popping and loader.
Worth a try mate
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Well this problem got worse to the point where when accelerating it was just juddering lots and not really going anywhere... then the engine light came on and i had to drive home in limp mode one day.
Put it into the garage and the only fault registered was with the n75 valve... which was changed and it was perfect... for a couple of days...
It felt quicker and the gear changed were alot better with seemingly no interruption in power (before there had been quite a fag before the boost kicked back in after a gear change... there is another thread on that)
just got home from a mates house (about 50 miles away) and its started doing the juddering again in 5th and 6th at low revs when you put your foot down.. it jumps about and seems 'lumpy'.
Bit worried now that its my actual wastegate thats faulty as thats part of the turbo. No other faults were registered last time so we ruled out coilpacks etc and didnt change those in the end.
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coil packs dont always show fault codes. :happy2:
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and would they cause lumpy running
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Only from what i have read on here, they show all sorts of symptoms. They dont cost to much in the grand scheme of things and if they dont solve your problem, you can sell them on or keep for spares. :happy2: the other common one is the plugs. :happy2:
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Do coil packs need the ecu to be reset?
The mechanic i use is away for a week now.
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Dont think so. :happy2:
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change the plugs first :happy2:
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change the plugs first :happy2:
It was given a full service at VW just before I bought it (about 3000 miles ago now). Should this still be my first point of call?
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It was given a full service at VW just before I bought it (about 3000 miles ago now). Should this still be my first point of call?
Yes as iirc plugs aren't changed before 60k miles according to the VW service schedule. The dealer can sometimes "forget" them even then.
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Service book is stamped at 53911 miles for a major service and has a tick for the spark plugs. The 4 spark plugs (W06H 905 611) are on the invoice which I also have.
Regardless... I'll try changing them again... Which are the best ones to go for? Motech suggested using S3 ones?
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From searching the forum these seem to be the plugs to go for?
NGK 7's
http://www.ebay.co.uk/itm/4X-NEW-NGK-IRIDIUM-IX-SPARK-PLUG-BKR7EIX-2667-/160627783090?pt=UK_Motorcycle_Parts&hash=item25662975b2#ht_1427wt_924
If this doesnt work I'll do the coil packs and also check the PCV which I have read can cause running issues.
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If its mapped, get NGK 8s
Id be tempted to put 8s in even if it isn't. They've change my car irreversibly!
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Its stage 1 mapped.
As i understood oem was equivalent to ngk6. ngk8 would be 2 steps cooler then? Would i need to adjust the gap?
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6 was the old spec, VW changed the spec to 7 as 6 was too warm
8 will be one step cooler than VWs current spec
You shouldn't need to adjust the gap
If you are K03 stage one however, use NGK 7s.
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6 was the old spec, VW changed the spec to 7 as 6 was too warm
8 will be one step cooler than VWs current spec
You shouldn't need to adjust the gap
If you are K03 stage one however, use NGK 7s.
yeah a lowly k03 :) and just stage 1 with cat back exhaust fitted and intake to be fitted.
I'll stick with the ngk7's then... although I can get the ngk8's for slightly cheaper ..... if cost isnt an issue would you still say ngk7's?
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The 8s can be too cold for a KO3 if on stage 1. 8s are more so recommended for stage 2 upwards on KO3 :happy2:
Overall though, the iridium IX sparks are about as good as it gets. Conduct almost as well as copper, but last as long as platinum
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The 8s can be too cold for a KO3 if on stage 1. 8s are more so recommended for stage 2 upwards on KO3 :happy2:
Overall though, the iridium IX sparks are about as good as it gets. Conduct almost as well as copper, but last as long as platinum
excellent thanks for your advice. NGK7's it is. I'm not overly confident this is the source of my problem as like I say they were only changed July 2011. However new sparks wont harm things and will just rule one more thing out.
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Mine were replaced in March 2011, and by November they were ruined (if working right to begin with that is!!)
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Mine were replaced in March 2011, and by November they were ruined (if working right to begin with that is!!)
Thanks not right for them to be shot so quickly though surely? Suggests other running issues?
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A bad map ruined them I think. Over fuelling made them soot up and overheat
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just changed the spark plugs to the ngk7s. The ones i took out were VW ones and didnt look bad at all. The service book says they were changed about 7k ago and it certainly looks like thats the case.
The coil packs were all the new F revisions as well and this ties in with the fact that vw say there are no outstanding recalls on my car so possibly these were changed before I bought the car.
Wonder if its still worth changing them?? just to rule them out really? Visually they all looked fine. No discolouration or burning like ive seen on some peoples photos on the web.
Not sure what to do now.
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See if the plugs fix it first. Also most peeps go for the VW,oem plugs, as lots of the aftermarket ones can also cause slight running issues too. :happy2:
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See if the plugs fix it first. Also most peeps go for the VW,oem plugs, as lots of the aftermarket ones can also cause slight running issues too. :happy2:
grrrr.... well i chose the ngk ones after lots of people seemed to rate them and say they were the ones to go for!
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Ngk7s are the same as vw ones, but are iridium rather than platinum :happy2:
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And also even though a spark plug looks ok it can still be faulty!
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Have you checked the DV and the cam follower? I
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Have you checked the DV and the cam follower? I
dv was changed a few months ago for the latest version.
not sure what or where the cam follower is or how i would check it
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im getting bored of this...
So the problem is still there.
It drove fine on my 15 min test drive after changing the sparks. It drove fine on a 40 min drive at varying speeds on the m11.
The driving back tonight i stuck the cruise on 80 and drove for about 35 mins and then dropped in speed and when i put my foot down again (in 6th in manual) it started doing the hesitation and lumpy running.
Each time its done it.. its been after a decent run at around 80mph .. a couple of times on cruise and once just keeping a steady speed with the throttle. Thats the only similarity I can think of.
I tried to take a video but it doesnt show how 'lumpy' it feels.
What you can see is it sort of surge a bit when i put my foot down and then the revs drop a bit and then slowly continue to raise... but as they are slowly raising it feels very hesitant and lumpy. Its hard to see.
I had it in manual mode on the dsg
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As has been the case before... car runs fine this morning.. no hesitations like last night.
Popped it to the garage who plugged it in and it had these faults..
01089 EVAP emissions control system
Incorrect flow P0441 Upper limit reached intermittent
08567 Bank 1; system too lean off idle p2177 upper limit reached
Its going to have the fuel filter changed (they are due on 60k and mine is 59500 now so likely never been done and maybe a huge co-incidence but the running issues did start after I got stuck in the middle of no where and the only fuel I could find was cheapo Merrisons fuel). He is also going to check for inlet leaks.
He doesnt think its a coil pack as it seems to go back to running fine most of the time.
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It sounds pretty similar to what happened with mine but mine worsened pretty quick and the car began stalling at random points. I did a fair bit of research into it and one of the things that kept cropping up was the cam follower (http://www.mk5golfgti.co.uk/forum/index.php/topic,8339.0.html) so may be worth checking as its pretty simple if you get the correct tools. Might be worth a check?
My thread:
http://www.mk5golfgti.co.uk/forum/index.php/topic,30046.0.html
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It sounds pretty similar to what happened with mine but mine worsened pretty quick and the car began stalling at random points. I did a fair bit of research into it and one of the things that kept cropping up was the cam follower (http://www.mk5golfgti.co.uk/forum/index.php/topic,8339.0.html) so may be worth checking as its pretty simple if you get the correct tools. Might be worth a check?
My thread:
http://www.mk5golfgti.co.uk/forum/index.php/topic,30046.0.html
Thanks... I'll have a look into it... although yours wasnt actually the cam follower in the end?... also mine isnt trying to stall... its just at very random times it seems to be very hesitant and jerky at low rpm... mainly after a long run.
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Have I missed what your idle is like?
See if you can log missfire counter for all cylinders at idle :happy2:
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Have I missed what your idle is like?
See if you can log missfire counter for all cylinders at idle :happy2:
even when the problem is happening after a run.. the idle seems fine.
I've not got vagcom at the moment. (sometimes borrow the cable off a customer but i havent seen them in a while now)
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I had a swine of an issue before xmas.
long story short (its all in my build thread) it was injector 3.
I had symptoms of duff plugs/coils/pcv and a couple of hiccups on idle VCDS was counting lots of missfires on cyl3 tho. New injector cured it
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I had a swine of an issue before xmas.
long story short (its all in my build thread) it was injector 3.
I had symptoms of duff plugs/coils/pcv and a couple of hiccups on idle VCDS was counting lots of missfires on cyl3 tho. New injector cured it
which channels do you need to log. Its a pain in a way it doesnt do it all the time though. Like today when I took it to the garage it felt fine. Its very intermittent.
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When I checked the missfire counter it was under basic measuring as I wasnt out logging just checking outside my house.
No need to choose channels like when doing specific logs, basic measuring has preset channels no 15 springs to mind.