GolfGTIforum.co.uk
Model specific boards => Golf mk6 => Topic started by: branchespark on 09 March 2011, 07:49
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A little strange one this, but I've noticed with my GTD that, when I go over a certain hump back bridge on my way to and from work, there is loss of power when coming down "the other side". I have also seen this going in to dips.
Has anyone else seen such behaviour? Is some clever wizardry trying to take control of the situation (and, quite frankly, cocking it up)?
It's like a flat spot with loss of power. And no, I'm not tapping the brake pedal at the same time in the hope that I can be a rally driver!!
BP
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I've not experienced this in mine (luckily). Does it do it at any other time?
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Only in two places; on one railway hump back and another in a little dip. Very strange and, as with the warty Xenon, I'm starting to feel attached to the occasions!
BP
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Thats spooky, I've noticed some thing like this as I need to come home a different way, I turn a slow corner in 2nd then start down a hill as I change to 3rd I get that same feeling hard to explain like the car has braked this happens every time in the same place, could we be sub Consciously taking the foot off the gas? I've the GT TDi....
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I've tried it keeping at steady speed and foot rigid. Same thing!
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I've tried it keeping at steady speed and foot rigid. Same thing!
When this happens does the ESP light come on? You may be loosen traction and the ESP decides to take action. I have a hump that I get slight air on and ESP tries to deal with it.
Hope this helps.
Jim
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No, certainly no slipping of the rubber. Going too slow for that.
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I've noticed this also so your not alone :smiley:
To me it felt like the traction control coming in although I have never had the light come on in these situations. I've never had loss of traction but it feels like the TC none the less.
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I've heard of this problem before not so much the GTD but the TDI. I could post the link but you would have to join before you could read it. Mine doesn't suffer from this glitch.
You should have posted this in the TDI section?
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No problems with mine ether , but then again its DSG :smug:
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Maybe the XDS system doing something, sometimes, going around a corner it can feel a little weird.
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Felt this many a time just as you come over the pitch of a small slope at lowish speed
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Any idea's then?.
No ESP light for me and again same place/road yesterday..
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Not a clue really no ESP light has ever come on in any of the cars I have noticed it in which range from golf match 1.6tdi, scirocco 2.0tdi 170, gtd...........
Mystery
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Any idea's then?.
No ESP light for me and again same place/road yesterday..
Maybe it is doing its job but not lighting on the dash, I know some system only light up on the dash when they are really working.
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I've heard of this problem before not so much the GTD but the TDI. I could post the link but you would have to join before you could read it. Mine doesn't suffer from this glitch.
You should have posted this in the TDI section?
Like you say Keith it has been spoke about in other forums so obviously not an anomaly.
Not sure why it should have been in the TDI section though as petrol users have experienced the same.
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I've also experienced this in a 2.0 tdi audi a5, when going downhill with foot off the accelerator and when you try and accelerate downhill it's almost as though for a second it doesn't want you to!
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I'm pretty sure it's just the fact that the amount of force you are applying to the throttle pedal reduces as the car comes off the bridge/drops into a dip, in the same way your backside lifts off the seat cushion.
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Try putting the cruise control on and see what happens?
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Not sure why it should have been in the TDI section though as petrol users have experienced the same.
Well if petrol version suffer from this then ok but I've only heard of TDI's with this problem.
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Decided yesterday not to change up just stay in 2nd, so going just a little slower, NOTHING just carrie on... will try again today!!
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I like the cruise control idea, but that also involves playing chicken, as you can't always see what's coming and oncoming traffic has right of way! ;)
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I don't believe for a second that it's the foot coming off the accelerator, a hump and a dip would act differently ie one would cause an increase in speed (dip) the other a decrease (a rise)
I'm convinced it's the traction control doing something a little odd!!
Jim
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i've also had this on the same hump in the road..... doesn't feel like the TC to me.... more like it mis fires alittle....
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i've also had this on the same hump in the road..... doesn't feel like the TC to me.... more like it mis fires alittle....
It might feel like a misfire, but how can a car misfire on a certain bit of road that just so happens to be a dip or a rise. It's just not plausible I’m afraid.
It has to be the stablility system doing it's magic.
JIm
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Upgraded sound systems needed to really enjoy humping, backing and dipping. :evil: :grin:
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It will be the esp or tc system cutting in. :smiley:
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Can't possibly be ESP as the system uses no vertical accelerometers, only lateral ones. Its your foot easing off the pedal - simple physics. Coming off a hump bridge is exactly the same as going down into a dip. Being in a lower gear will obviously make the effect more noticable.
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Can't possibly be ESP as the system uses no vertical accelerometers, only lateral ones. Its your foot easing off the pedal - simple physics. Coming off a hump bridge is exactly the same as going down into a dip. Being in a lower gear will obviously make the effect more noticable.
Sorry but think you're completely wrong, when the wheels lose traction the ESP or traction control senses it, I had the very same thing occurring in my old A3, foot to the floor over a rise and power is cut when the car goes light!!
Simple physics dictate that your foot will act differently if your going over a rise or down in a dip. Down a dip more force I pushed down, over a rise and less force is used.
Jim
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lol did some testing today :D my bumps on a private road :evil:
10mph seems to be the "sweet speed" i can do it everytime now.
without touching the pedals and in 1st gear, as the cars front end goes lower than the rear... you can feel alittle resistance.... feels like engine braking/misfire, only for a split sec.... no flashing esp,
same in 2nd going to slow for others gears...... if i go over the hump not being it gear doesn't do it........but ....as the car gos down the hump.... the revs drop 200rpm and it revs up another 500rpm as the cars rear comes down the hump......
turn esp off, still does it.....
i think it could be somthing the ecu is doing. or its a physical fuel starvation issue.
doesn't do it going up the hill (humps on a hill).
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anyway thats all.... both my 1.6tdi and 2.0tdi do it??? the mk3 golf gti doesn't :evil: although sometimes i have to put the splitter back on
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Finally someone else has the same problem as me!
On my way home, I go over some big crests and in to some dips. My GTD also cuts the power. I left it in to VW to get looked at as I though it was a fault. I would be driving quite fast and all of a sudden it is like there is a limiter put on. VW said the car feels too light over the crest or feels to much load in the dip then cuts the power. It is like dabbing the brake and the car cutting the power. I was told that it isn't the actual traction control kicking in which explains why the light doesn't come on. I was told there are some other sensors that look after this.
It seems we are stuck with this! It could catch you out when racing if someone is close behind you then the power cuts, suddenly the car behind is now in your back bumper!
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@countrytrucker: spot on. same as me. hmmmm
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Oh dear. Diesel disasters. :sad:
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Its ever so slight, should never cause an accident...
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Oh dear. Diesel disasters. :sad:
PenguinGTI has had this so not exclusive to Diesels
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Oh dear. Diesel disasters. :sad:
PenguinGTI has had this so not exclusive to Diesels
Oh dear, dear. So it must be due to the re-map, or DSG, or lack of ACC, or just bad luck. :laugh:
I think I've covered most bases. :evil: :grin:
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Oh dear. Diesel disasters. :sad:
PenguinGTI has had this so not exclusive to Diesels
Oh dear, dear. So it must be due to the re-map, or DSG, or lack of ACC, or just bad luck. :laugh:
I think I've covered most bases. :evil: :grin:
Or could be supposed to do this and your's don't... covered the rest there me thinks..... :tongue:
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Thank you flc1962 for reiterating the clarity of my post. :smile: :smug:
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Not just GTDs,
"down 'ere Devon way lad" said in south-westerly accent :p there are lots of dips, noticed it in my 110bhp today, pretty weird!
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Oh dear, dear, dear. They'll soon be going backwards. :evil: :grin:
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Just been on the A68 in North Yorks / Northumberland and in-between some air-worthy moments, the car definately tries to take control when you want to accelerate while dropping down off a hump. A little disconcerting, but sure I can live with it!
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Mine does it.