Help needed for new Mk5 GTI owner

[lmannin8]

Couple of things have my slightly concerned and I'm wondering if anyone can lend some advice / experience.
When sat idle there's a slight juddering which you can feel while sat stopped.
Secondly, I have a whine at speed which I suspected wheel bearing (s) but having had it in a garage I'm told they seem fine and it may be gearbox! Has anyone had this?
The car is an 07 manual mk5 gti

[r5gtt]

Hi and welcome to the forum :)

Check your tyres as cheap tyres cause a horrible winning noise.
The tyres could be feathered on the edges- meaning the tread maybe up amd down like crocodile scales.

I'm having this slight juddering whilst sitting at idle so I've just purchased a set of new spark plugs and need to fit them.in to find out if this resolves the issue.
When was the last service and plug change carried out?.

M

[AJP]

Apparently the juddering is caused by carbon buildup within the engine. Mine does this, once the engine's hot.

Not sure what can be done short of stripping the head and having valves cleaned etc. Terraclean and similar services seem to get mixed reviews.

Welcome to the site.

[lmannin8]

Hi there, thanks for the response.
When I picked up the car I had 4 new Pirellis P Zero's tracked, balanced and 4 wheel alignment done so hopefully that rules them out unless anyone knows this to be a noisy tire.
I'd be interested to hear how you get on with the spark plugs, how much and where did you purchase from please?

Leon

[lmannin8]

I think mine doesn't need to be hot for the judder. I am aware I'm not using Super Unleaded though which when I fill it up will use from herein. Didn't realise this was a critical factor for FSI Engines.

[r5gtt]

Hi there, thanks for the response.
When I picked up the car I had 4 new Pirellis P Zero's tracked, balanced and 4 wheel alignment done so hopefully that rules them out unless anyone knows this to be a noisy tire.
I'd be interested to hear how you get on with the spark plugs, how much and where did you purchase from please?

Leon

Used pirelli p zero tyres tend to be more harsh for the road as I used them for 3 years on my TT before moving to Eagle F1 which to me were brilliant tyres and had amazing grip.

Plugs I purchased from ebay iridium BKR7EIX cost me £26.65 free carriage. here's the item number FYI.  161062214707

I will try fit the plugs in tomorrow if it's not too cold or wet of course.

M

Apparently the juddering is caused by carbon buildup within the engine. Mine does this, once the engine's hot.

Not sure what can be done short of stripping the head and having valves cleaned etc. Terraclean and similar services seem to get mixed reviews.

Welcome to the site.

Really?, I've not heard of that but think I read that some where.
How does this carbon build up 

M

[AJP]

It's the nature of direct injection as far as I know.

[r5gtt]

It's the nature of direct injection as far as I know.

Another stupid design for VAG huh?.

I'll let you know what happens when I replaced plugs with these Iridiums.

Also another thing I recall with the audi mk1 TT was the earth straps we added to the engine to chassis did make a huge difference as they tend to idle a little up and down.
 I have loads of spare leads and gold plated cheese blocks so I'll do an earth lead add on and see how that turns out.

possible with pictures to guide you all. 

M

[lmannin8]

Good man, cheers! Look forward to hearing the updates. Thanks again.

[r5gtt]

Not a problem :)

M

[r5gtt]

Replaced the plugs with BKR7EIX Iridium plugs and idle has stabled with zero fluctuation.

Also fitted this Neuspeed P-flo and Ramair filter back on to see if there was any difference and yet again found that way too much air is sucking in and I'm losing boost  also tried a different cone filter and that was a little better but still losing boost.


My old plugs.

[TAPPY]

My gti judders also on idle hot or cold, I have changed the plugs, pcv, cam follower, fuel filter but it still does it. I run it on v-power or bp ultimate if there's no shell near by my next option will be to clean the intake valves.
http://www.mk5golfgti.co.uk/forum/index.php/topic,79369.msg825776.html#msg825776

[r5gtt]

My gti judders also on idle hot or cold, I have changed the plugs, pcv, cam follower, fuel filter but it still does it. I run it on v-power or bp ultimate if there's no shell near by my next option will be to clean the intake valves.
http://www.mk5golfgti.co.uk/forum/index.php/topic,79369.msg825776.html#msg825776

that's terrible dude,

I must have got lucky.

What mileage you on?.

Have you tried the petrol injector one shot treatments?.

M

[TAPPY]

I'm on 94k buddy I haven't tried any treatments like that might be worth a go as I have tried pretty much everything else. I have even had my mate at audi plug it into there system and he couldn't find anything wrong that's when he said try changing the fuel filter I case it has some s#*t in there.

[r5gtt]

24k more than me. I'd give it a try as it's cheap and may well help clean that coking up or reduce it.

I've read the full thread you posted and it could well be the injectors. Are you mapped?.

M