GolfGTIforum.co.uk
Model specific boards => Golf mk5 => Topic started by: Phill on 10 August 2008, 20:48
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Hi guys and gals :)
I've recently just bought a MK5 GTI on a 55 plate and since owning it, I've noticed its running lumpy and sometimes rather hesitant.. I did have a misfire on cyclinder 1 a week ago but they changed out the coil pack on cyclinder 1 and it seems to be ok, but its still got the lumpyness and hesitation...
Its more so at lower revs, upto 2000rpms or so, seems to be like a jack in the box at times!! :lol: I just wondered if anyone knew what might be causing this problem, because its going into the VW Garage for an MOT on Thursday, but they'll have the car from Wednesday night to check it all over for me. If have some ideas of what could be causing the car to feel like its holding back that would be ideal. since the hassles I had with my GT TDI with them, they wanna keep me happy or else they'll have the keys back!! :D
I know I'm driving it rather light footed at the moment as when I mentioned I was getting over 38mpg the reaction I got was shocking!! :lol:
Any suggestions or thoughts would be great :) Thanks in advance :)
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Hi and welcome,
It seems common that if one coilpack has gone , its prob advisory to replace all 4.
Depends on the error message next time its plugged into vw diagnostics.
This is a good ref piece
http://www.golfmkv.com/forums/showthread.php?t=24952
Let us know how you get on
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They did only replace the single coil pack as they'll only seem to replace the item thats faulty. It was the same for my GT TDI when I had a tappet gone, they only replaced the single tappet that was faulty, not the complete set.
It was complaining about the misfire on cyclinder 1 but also that the turbo wasnt getting the correct boost, but I'd assume it was due to the misfiring anyways?
I've got a few things on my 'list' for them to have a look at and I hope they have a good hard look as with the problems I've had with my TDI I hope they are more likely to sort these out rather than me going after another Golf elsewhere...
I will see how things go with the MOT they are doing and whatever else they find. Hopefully it'll come back as it should be, but I have my reservetations about it. When they test drove it, they said it seems fine, but its not fine for me!!
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lumpy idle is normal (within reason)
incorrect boost I wouldnt normally link with a coil pack though.
Read that thread and see if a common element might cause both (e.g. something like fuel pump lobe wear issue)
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I dont think lumpy idles should be normal on a £15k car!! :lol: God it reminds me of all the hassles I had with my Scooby after I had that remapped... Ugh..
Well they where mentioning that the incorrect boost was due to the misfire as it was not fueling that cyclinder when it was misfiring so I assume it would do that anyways...
I dont understand why the car is lumpy or holding back whilst accelerating slowly tho? Makes me feel like I'm in a jack in the box at times :lol:
I wish we had some decent rolling roads by us because that would definitely show if something was wrong with the boost, fueling or map for damn sure... :( Might be nice to also have a base figure if I decide on mapping it or something... Got to definitely change those front brakes anyways.... ;)
Thanks so far for the advice :)
Also a quick question.... The VW garage I bought it from, said to use Super Unleaded in the car rather than the normal 95 Ron stuff, is this a good thing to do or not? I notice on the filler cap that it suggests to use 98 ron but where I live I dont have any Shell garages close to me.. Not unless I wanna go for a 90 mile around trip anyways :lol:
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Tesco's does 99 ron :wink:
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I thought that was only 97 ron now?? I've always just put in Sainsburys Super which is BP Ultimate at a lot cheaper price!! Also tried Shell whilst I was up at Wolverhampton (since my fiance lives around there) and that didnt make any difference whatsoever!! :lol: I'll stick with Sainsbury's until I know otherwise ;)
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Hi guys and gals :)
I've recently just bought a MK5 GTI on a 55 plate and since owning it, I've noticed its running lumpy and sometimes rather hesitant.. I did have a misfire on cyclinder 1 a week ago but they changed out the coil pack on cyclinder 1 and it seems to be ok, but its still got the lumpyness and hesitation...
Its more so at lower revs, upto 2000rpms or so, seems to be like a jack in the box at times!! :lol: I just wondered if anyone knew what might be causing this problem, because its going into the VW Garage for an MOT on Thursday, but they'll have the car from Wednesday night to check it all over for me. If have some ideas of what could be causing the car to feel like its holding back that would be ideal. since the hassles I had with my GT TDI with them, they wanna keep me happy or else they'll have the keys back!! :D
I know I'm driving it rather light footed at the moment as when I mentioned I was getting over 38mpg the reaction I got was shocking!! :lol:
Any suggestions or thoughts would be great :) Thanks in advance :)
If your getting 38mph then it wont matter what you put in. :laugh:
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Hi guys and gals :)
I've recently just bought a MK5 GTI on a 55 plate and since owning it, I've noticed its running lumpy and sometimes rather hesitant.. I did have a misfire on cyclinder 1 a week ago but they changed out the coil pack on cyclinder 1 and it seems to be ok, but its still got the lumpyness and hesitation...
Phill, VAG-COM will be your friend. If you don't have it, then ask the garage for a copy of the printout of all the stored fault codes - otherwise you could just be guessing, and replacing unnecessary parts. Just as important, make sure the garage CLEARS all the stored fault codes, otherwise, even if they've replaced any offending parts, the stored fault codes can still make the engine run like a bag of . . . .
Its more so at lower revs, upto 2000rpms or so, seems to be like a jack in the box at times!! :lol: I just wondered if anyone knew what might be causing this problem, because its going into the VW Garage for an MOT on Thursday, but they'll have the car from Wednesday night to check it all over for me. If have some ideas of what could be causing the car to feel like its holding back that would be ideal. since the hassles I had with my GT TDI with them, they wanna keep me happy or else they'll have the keys back!! :D
An MoT, particularly if its done at a main stealer, won't specifically check for any non-MoT faults!
I know I'm driving it rather light footed at the moment as when I mentioned I was getting over 38mpg the reaction I got was shocking!! :lol:
Any suggestions or thoughts would be great :) Thanks in advance :)
Start giving it some beans - it may simply be coked up, and need an "italian tune up"! :wink: :wink:
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lumpy idle is normal (within reason)
Hmmm . . . can't really agree with that.
incorrect boost I wouldnt normally link with a coil pack though.
Again, can't agree. If the sh@gged coil pack has stored a fault code, then the engine will run in "limp home" mode, which will cut turbo boost. :nerd:
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I thought that was only 97 ron now??
Nope, all Tescos Super Unleaded is (should) now 99RON, supplied by Greenergy. Tesco 99 is also the official fuel of the British Rally Championship. And finally, in independent tests, it has a clear advantage over BP Ultimate (97RON), and a marginal (but worthwhile) advantage over Shell V-Power (also 99RON).
I've always just put in Sainsburys Super which is BP Ultimate at a lot cheaper price!!
Sainsburys Super is definately NOT the same as BP Ultimate. OK, it may be the same 97RON, but the BP juice has a better additives package than the Sainsburys juice.
Also tried Shell whilst I was up at Wolverhampton (since my fiance lives around there) and that didnt make any difference whatsoever!! :lol: I'll stick with Sainsbury's until I know otherwise ;)
But you need to allow the ECU to "adapt" to the higher grade brew, especially if it has always had the 95RON pauper brew. :nerd: Futhermore, if you are getting 38mpg, then your driving style will not "instruct" the ECU to adapt! :smug:
With the higher ocatane (minimum 98RON, which rules out all but Tesco 99 and Shell V-Power), once the ECU has adapted, then not only will you get more power, but because the engine will be working at it's optimally desinged settings, you will also get better fuel economy too.
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Teutonic_ Tamer me think,s you are slightly autistic :wink: were on earth do you fit all this info in your head and more importantly you seem to research every point how do you find time to do this :nerd: :drool:
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fair enough TT , I bow to your superior knowledge on all but the lumpy idle.
Mine is def NOT smooth , and hunts as if it has an ignition problem (felt through seat/pedals etc).
Even to the point passengers have commented.
It comes and goes in severity, and seems to change with fuel type, but I dont believe I have a 'problem'
What I would say is that the level of engine movement on various GTI's Ive seen on rolling roads under load is vastly different, some move lots , others hardly at all. So maybe that exacerbates the effect?
Anyway Im not wishing to hijack.
Phil let us know how it goes.
JohnO
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Teutonic_ Tamer me think,s you are slightly autistic :wink:
Just call me the "Oracle" :tongue: :grin: :grin:
No, don't - I like my handle.
were on earth do you fit all this info in your head and more importantly you seem to research every point how do you find time to do this :nerd: :drool:
See my sig (too much time on my hands) :rolleyes:
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Teutonic_ Tamer me think,s you are slightly autistic :wink: were on earth do you fit all this info in your head and more importantly you seem to research every point how do you find time to do this :nerd: :drool:
Thats exactly what I was thinking... some of his posts make me dizzy :grin: :grin: :grin:
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fair enough TT , I bow to your superior knowledge on all but the lumpy idle.
You confused me - I thought you were the OP, but you aint! :embarassed:
Mine is def NOT smooth , and hunts as if it has an ignition problem (felt through seat/pedals etc).
Even to the point passengers have commented.
It comes and goes in severity, and seems to change with fuel type, but I dont believe I have a 'problem'
OK, I'm no Ed30 expert, only having a mere GTI :wink: - but if it's "hunting", then that is often a sign of an air leak in the induction system somewhere. Saying that, it could also be a dodgy MAF. Does it give good power under load, smoothly up to the red line? If so, then it prolly aint the MAF.
Have you hooked it up to VAG-COM? Check for stored fault codes, and if any are found, clear them, take it for a good run, and recheck for fault codes, and report back. Also, if you do have VAG-COM, a data log of turbo boost would be good, along with inlet air temps.
What I would say is that the level of engine movement on various GTI's Ive seen on rolling roads under load is vastly different, some move lots , others hardly at all. So maybe that exacerbates the effect?
Ohhhh, I'm having the rear mount replaced under warranty - but it was like getting blood out of a stone - "they all do that, sir". Bollox (or words to that effect :wink:) was my reply. After their refusal to find another GTI with pendulum-like engine mounts, theyve ordered in the part. Just gotta book it in when the Touareg is available as a courtessy car.
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some ed 30 owners on here have said their s sounds like a diesel ! others say they got lumpy idle ! i can only say some thing is wrong !! mine sounds as sweet as a nut at idle and pulls right to the red line with no hesitation what so ever, i thought thats how they were suppose to be ??? i ve used v power since day one :smiley:
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You confused me - I thought you were the OP, but you aint! :embarassed:
If I knew what the OP was , I might be :grin:
Does it give good power under load, smoothly up to the red line? If so, then it prolly aint the MAF.
On Awesomes RR twice now giving good power , pulls clean and hard (esp on 99RON) , no fault codes
There aint nothing wrong me thinks :wink:
Ohhhh, I'm having the rear mount replaced under warranty
Might be worth me getting mine changed too then me thinks....
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Well guys, I'm really sorry I've not replied to my own thread!! :( I never thought so many people would reply!! Would have helped also if the damn email notifications had worked properly!! :lol:
Right an update in the situation...
It went in for its MOT and they found that the waste gate was leaking boost, so they replaced the pipe (I think it was the pipe) and it went through the MOT just fine with the emissions testing...
It also seems a lot more responsive in the revs and in any gears now with this done. But, its still running lumpy and seems to be during the driving or at idle..
I have used Shell V Power but with the same results as before. It was still lumpy at idle and lumpy which moving, which wasnt ideal.
It seems to feel to me that its holding back slightly when going along, kinda like missing but not as badly? I find it when your crusing with the cruise control on, or whether your going through in traffic it feels to be holding back.
Whilst I had my Subaru, when it was mapped it was mapped on Sainsburys Super and I never had any issues with it at all.. I find that the car feels quicker with the waste gate repaired, but it still has a fair way to go to get the same performance as my Rover 220 Turbo Coupe... ;) The last time I was hearing Tesco's was just 97 Ron super, but maybe I was misinformed..
Everything is under warrenty so if something doesnt work, it'll be repaired for free :D I've got full component warrenty so I'm gonna try and make the most of it! :lol: :) My last GT TDI certainly did :lol:
I've had the car hooked up to the 'PC' that reports the codes which reported the misfire on cyclinder 1 and the lack of power for the turbo but I'm unsure if they had cleared the findings or not since. They seem to think I'm a pain in the ass I think, but having paid a lot of money for this car and I want it running right.
If I've missed anything, please let me know :) I had a few posts to read and comment on :lol:
The lowest mpg so far is just over 35mpg, but the best is nearing 39mpg :) I've had the trip computer giving me an average of over 45mpg ;) Not bad for a 40 mile trip either :lol: Seems to manage 400 miles at least from a tank.. Ever since I've had the car, its been run on Super unleaded at a minimum, Sainsburys mostly as I dont live near Shell so its the best place.... :(
Oh did a bit of research on the fuel searching...
http://www.petrolprices.com/sainsburys.html
http://www.petrolprices.com/tesco.html
Also it seems that the Tesco 99 Ron super fuel is only available at certain places so oh well :(