MK5 Golf GTI
All Things Mk5 => Mk5 General Area => Topic started by: winrya on October 22, 2009, 05:13:19 pm
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Hey guys. A few days ago accelerating hard in third gear, at approx 4-5k rpm in 3rd the car paused very slightly and continued at full power. It was slightly wet and I considered it may be a bit of wheel spin and the traction control cutting in (I'm bedding in new tyres??). I gave it a bit of a thrash to see if I could replicate it but could not. Today at the same revs in 4th I got the tiny pause/stutter again. Again it didn't happen again. I'm now worried it's more than a traction issue.
I don't think it's clutch as the revs didn't continue to rise. I'd imagine dv valve would not continue boosting after An initial loss?
Bad fuel?
Misfire?
Could be nothing but I'm stressing it could be expensive. Would vag.com log boost leaks or misfires?
Any ideas or similar experiences, I'd appreciate the feedback.
Cheers
Ryan
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Some questions:
1. What stage is your car?
2. Do you have any VCDS logs and codes?
3. Which SW are you using?
It could be that you experienced a small fuel cut and this could have led to a misfire. However his is only speculation and I would only be able to say more with VCDS.
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It's running revo stage 1 and has been since January. I don't have access to logging, would a fuel cut happen after such a long time. The first time it happened I only had a range of 15 mile so not much fuel and today only 50 mile range ?
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I noticed after logging my car that with certain settings on REVO you can run your HPFP very close to the limits and get yourself into fuel cutting territory. The amount of fuel left in your tank will not affect this.
Do you have an SPS and know which settings your car is running?
I really recommend trying to find someone with VCDS close to you who is willing to help take some logs otherwise we are flying blind.
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When was your last service, I experience an off hesitation at high revs when giving it some beans - turned out to be the plugs.
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When was your last service, I experience an off hesitation at high revs when giving it some beans - turned out to be the plugs.
It was serviced in April and had spark plugs then. I'm pretty sure it is running quite aggressive settings, i know fuel was 9 and to be honest I'm pretty sure it was 9 6 9 or maybe 6 6 9.
I've just been out for a hard drive and couldn't replicate the problem. Accelerating hard in 3rd and 4th the only thing that was happening was the traction control kicking in and with it off lighting up the front tyres. I'm pretty sure the F1's didn't light up at 70+ mph but these Vredestein Ultrac Sessanta certainly do. Maybe its different characteristics of the tyres but the car felt superb and definitely full power. If i notice it again i will take it to votex in congleton and see what they say, bit of a drive but as they remapped it, I'm sure they will be as helpful as ever. I have revision G DV at the moment and may change to the new piston type while I'm there.
Thanks for the comments guys
Ryan
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sounds like the start of a coilpack going down to me .
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Sounds like dv not re-seating properly to me on fast gear changes.
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sounds like the start of a coilpack going down to me .
That did cross my mind, what cost is the coil pack on the gti?
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Sounds like dv not re-seating properly to me on fast gear changes.
Its not on gear changes, for example, the first time i went from 1800rpm in 3rd all the way to 5-6k accelerating up a hill onto the motorway, the pick up was strong and was on a strong surge until the small pause at 4-5k and then back on full power. It "could" be traction control kicking in but i fear it was more. Maybe a bad bit of fuel in the bottom of the tank. Everything else is perfect, if it happens again I'll go from there. I could never turn the map off, I'd have to sell the car as I just couldn't enjoy it standard after feeling like such a different car for the past 8 months :sick:
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Vagcom should show missfires, but when I had my problem it didnt log one until it really started missing - I couldnt get it to do it all the time only at higher revs in 4th/5th.
If you can get it to log a fault you can swap the coilpacks round to see if the fault follows.
Most the time my car would run completely fine, just did this every so often over a few months.
Set of plugs would set you back around £25 I think, a coilpack is again around the £25 - each mind you.
I would recommend swapping the plugs every 10k in a remapped car - preventative maintenance.
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What type of fuel are you using Ryan?
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What type of fuel are you using Ryan?
tesco 99 usually but this last tank is v power
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What type of fuel are you using Ryan?
tesco 99 usually but this last tank is v power
Maybe running the tank close to empty has picked up some contamination from the bottom of the tank then?
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What type of fuel are you using Ryan?
tesco 99 usually but this last tank is v power
Maybe running the tank close to empty has picked up some contamination from the bottom of the tank then?
I'm hoping it's as simple as that, may well get the dv changed to the latest revision and change the spark plugs. Mmm hate silly problems like these. New tv, tyres and redecorating the lounge already has me close to £1500 down this week:(
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Fuel cut??
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I put money on the plugs if its just like you describe - sounds too similar to mine. I ended up swapping the coilpacks first but it didnt really need them - plugs wont hurt it anyway :wink:
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I'm pretty sure it is running quite aggressive settings, i know fuel was 9 and to be honest I'm pretty sure it was 9 6 9 or maybe 6 6 9.
If you are running a boost setting of 9 on standard hw then you will most likely run into problems like fuel cuts. However I doubt this is the case as you have been problem free with the remap since Jan.
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pull the boost down to B7 T6F9 thats what revo set mine up on as they said u need an intake to run B9 but i only ever had that blip like yours once on B9
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i would say fuel cut / knock sensor kicking in cos of low fuel so cuts boost suddenly...
i would never do WOT / full boost if the car is running on empty. asking for trouble really. Det / Pink / BANG!
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prob just a coilpack on the way out ..
however to be on the safe side you need to consider it could be a fuel cut , which given its hasnt happened before you may wish to get your cam follower checked esp if its an early gti
what yr and number of miles is your car?
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prob just a coilpack on the way out ..
however to be on the safe side you need to consider it could be a fuel cut , which given its hasnt happened before you may wish to get your cam follower checked esp if its an early gti
what yr and number of miles is your car?
it's a 2005 with 39k
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I presume If it's a fuel cut it will have been logged? Would a boost leak also log? Cheers guys
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prob just a coilpack on the way out ..
however to be on the safe side you need to consider it could be a fuel cut , which given its hasnt happened before you may wish to get your cam follower checked esp if its an early gti
what yr and number of miles is your car?
it's a 2005 with 39k
in which case you should get the fault codes + log if possible , as you do have an early GTI which may have the REV A camshaft...
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Ryan is anyone on this list close to you. I am sure all would be happy to do some logging with you. :happy2:
http://www.mk5golfgti.co.uk/forum/index.php?topic=120.0
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Ryan is anyone on this list close to you. I am sure all would be happy to do some logging with you. :happy2:
http://www.mk5golfgti.co.uk/forum/index.php?topic=120.0
stealthwolf is based in west mids, anyone know where? I'm in Telford. Filled up with tesco 99 today and have done 30 testing miles without fault?
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I am sure he would meet up with you he is a good egg. Give him a PM :drinking:
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What type of fuel are you using Ryan?
tesco 99 usually but this last tank is v power
Maybe running the tank close to empty has picked up some contamination from the bottom of the tank then?
That is a bit of 'old skool' thinking - on two grounds. The fuel pickup is actually in the very bottom of the tank, and so will suck up any sh!t weather the tank is full or empty. And then there is the full flow inline fuel filter. :wink:
But thinking aloud, if the tank was quite low, it may actually be simply down to fuel starvation, due to a slightly lazy in-tank pick up pump (ECU and CAN controlled - so will throw a MIL light).
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Do Revo have Manual and dsg Version'd maps like Superchips?
I had a lean "sneeze" or misfire develop at 70mph in 4th, which was cured with correct map.
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What type of fuel are you using Ryan?
tesco 99 usually but this last tank is v power
Maybe running the tank close to empty has picked up some contamination from the bottom of the tank then?
That is a bit of 'old skool' thinking - on two grounds. The fuel pickup is actually in the very bottom of the tank, and so will suck up any sh!t weather the tank is full or empty. And then there is the full flow inline fuel filter. :wink:
But thinking aloud, if the tank was quite low, it may actually be simply down to fuel starvation, due to a slightly lazy in-tank pick up pump (ECU and CAN controlled - so will throw a MIL light).
Good point :happy2: :ashamed:
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stealthwolf is based in west mids, anyone know where?
Birmingham mate. Could have made it with the thirty miles of testing you did! :grin:
I am sure he would meet up with you he is a good egg. :drinking:
Thanks for that TC!
Only submission I make is that I haven't explored VCDS fully, so whilst I can do scans etc, I have no idea how to do logging whilst driving etc.
If you wanna meet up, gimme a PM to arrange it. I've got funny shifts at work at the mo so it might be tricky sorting out a time and place but I'm sure we can working something out.