vRS 2.0T FSI - Stuttering at idle and on acceleration up to 2000 rpm...

[bert13]

I had a similar problem to this on my 105k 57 plate vrs. Changed coil packs - no effect.

Removed the intake manifold (a fairly time consuming job) and found the inlet tracts were gummed up to buggery. I have posted the pictures on here before. 2 tins of carb cleaner, 2 roles of kitchen cloth and 4 hours of careful cleaning later I put it all back together (another couple of hours). The problem has now gone completely. I've done a further 5k since with no reoccurrence.

If you search this forum you'll find a link to the mk5golfgti forum which has an excellent description and links of how to do it. It took me about 10 hours over a few days in freezing temperatures to do it. Its not that difficult, but I highly recommend buying a 4" long m10 triple square bit (also referred to as a splined bit - not a torx bit) before you start.

Hope this helps.

[bert13]

http://www.golfmkv.com/forums/showthread.php?t=103885

Here's the golf link.

[bert13]

This should be nice and shiny, but it's covered in oil deposits. Sea foam or the like won't touch it - there is just too much of it. The first thing I noticed when trying to diagnose the problem was how oily the spark plugs were - Even the new ones I put in oiled up quickly. This may be a good tell tale to look for. The inlet flaps were also covered.

[Wardy-]

Hi all - sorry to hijack, but I think I have a similar issue.

Just driving to work this morning and car suddenly felt very 'throttley'. Assumed it was just me, but then when I stopped it, the rev counter is going up to ~2k on it's own without any acceleration. Pretty sure I could hear a clonking noise from somewhere on the car as well :(

Possible that my clutch has gone? Valve? Coilpack?

Edited 15 May, 2013 by Wardy-

[Wardy-]

I've just driven it again and the issue seems to have gone??

Something sounds faulty... :think:

[martziniuk]

Water meth is the cure

[Wardy-]

Ok issue hasn't gone, far from it :(

There's so much stutter at idle. When I drove back earlier, the car almost drives itself at low speeds as the revs stick at 2k then suddenly returns to normal.

Engine vibrating a lot when bonnet open and exhaust has a lot of rattle as a result

[07 vRS Taxi]

Have you had the revised PCV?

[R8MXX]

Sounds like a massive air leak to me.... PCV valve could be the cause but it must be majorily foobared to be making it play up that much!

[Wardy-]

Quick update...

Went to my mechanic this morning and fault codes were showing signs towards;

- coilpack failure

- air filter failure

- misfire on cylinder 4 (although this didn't appear after reset)

- something also to do with higher revs than expected

Waiting for confirmation later on to find out the exact issue. Unplugged the MAF and issue didn't go away, so don't think it's that.

Will keep you posted!

Edited 16 May, 2013 by Wardy-

[07 vRS Taxi]

Sounds like a massive air leak to me.... PCV valve could be the cause but it must be majorily foobared to be making it play up that much!

did you change the manifold motor mate?

[Wardy-]

Have you had the revised PCV?

I've no idea to be honest mate. I'm only owned the car a couple of months, so not sure if this was done

[R8MXX]

did you change the manifold motor mate?

Got it sat in its box - going into the garage saturday to have it done as its a right ****** of a job!

[Wardy-]

Just checked with the dealer to see whether my car was affected by the Coilpack recall, but unfortunately not :(

[07 vRS Taxi]

Got it sat in its box - going into the garage saturday to have it done as its a right ****** of a job!

Hope it works out for you then, keep us posted..

[07 vRS Taxi]

I've no idea to be honest mate. I'm only owned the car a couple of months, so not sure if this was done

you can do a quick test by removing the filler cap at idle and if it almost dies you know its good, if there is little change you know its done!

[Wardy-]

you can do a quick test by removing the filler cap at idle and if it almost dies you know its good, if there is little change you know its done!

My mechanics got back to me.

This is the fault code that popped up:

http://www.obd-codes.com/p0507

You could well be right about the PCV valve

[R8MXX]

Update for all.

Had the new Intake Manifold flap motor fitted yesterday by my local VAG specialist. Not an easy job to do at all! The mounting bolts are covered by a multitude of high pressure air feeds and engine loom wires which meant the large majority of the loom need to be unplugged! The 3 bolts that hold it in place are T30 headed so to get a ratchet in there was a nightmare.

It took the specialist just over an hour to do in total then we ran basic settings on it via VCDS so the new motor could learn where fully open and fully closed positions were. Holding it at 1500rpm the revs no longer seem to be messing about and stay where they are put. Drove it yesterday on a 70 mile round trip and the hesitation in mid-range seems to have disappeared and the whole drive of the car is a lot smoother. However, I was on a A/B roads and the hesitation seems to happen more on motorways once I have been on cruise for a while and try to accelerate I am going down to Newquay for the bank holiday weekend so will report again after that are to whether it has fully solved the issue.

However, the stuttering on idle is still there.. not as pronounced as before but is still there. Am thinking this could be the inlet manifold requiring cleaning and the gunk in there may not be letting the flaps shut fully. Will look at this is the future but is something I can live with as long as the hesitation in mid rev range has disappeared.

Doing some more research into this I also found out that some people just run basic settings on their inlet manifold flap motor and it will stop the issue for a couple of weeks but then it starts creeping back, obviously due to the motor being worn internally and loosing its alignment again, so it could be worth trying this first as its cheap and see how long the issue stays away for before taking the plunge of buying a new motor. If you do need a new motor, contact me and I will give you all the details you need to buy one straight from the manufacturer (VDO) at £50 than the dealers!

Edited 19 May, 2013 by R8MXX

[07 vRS Taxi]

Thanks for sharing that mate, sorry to hear the fault is still there, as is mine but I never have time to do anything apart from essential maintenance these days but that's soon to change as im starting a new job soon. Anyway have you checked VCDS for misfire counts?

[R8MXX]

Thanks for sharing that mate, sorry to hear the fault is still there, as is mine but I never have time to do anything apart from essential maintenance these days but that's soon to change as im starting a new job soon. Anyway have you checked VCDS for misfire counts?

I dont have VCDS myself at the moment, I am just using the specialists setup whenever I need it and he was quite busy yesterday so didn't want to hold him up for too long (especially as he does VCDS things free of charge!) and dont want to take the ****...

Although thinking of getting my own VCDS cable in the next month or so.. As I said the idle issue I think is a dirty inlet manifold and its really not that bad. The VAG specialist has said to me that they don't run totally flat on idle anyway out of all the TFSI's he works on....

[Wardy-]

Have you had the revised PCV?

Sounds like a massive air leak to me.... PCV valve could be the cause but it must be majorily foobared to be making it play up that much!

Well guys you were both spot on, it was indeed the PCV Valve

[martinr]

I'm having similar issues at the moment, stuttering tickover, random rev increases at tickover and hesitant throttle while driving at low revs.

Been to the dealership and they had the car all day. The car had its fault list cleared last week and by this morning had a nice long list for the mechanic to resolve. The car had recorded that it had misfired on 3 or the 4 cylinders, they tried replacing coil / leads and no change. They also checked for air leaks but nothing obvious. The mechanic is suggesting its all pointing towards a faulty throttle body but can't guarentee it. They are trying to source one to try, but skoda want £400 so I'm not going to pay that on a 'maybe'.

I've got the car back while they look into the symptons with Skoda, but unfortunately its not an obvious quick fix.

[R8MXX]

Another update from me!

I still have the issue just as bad as before, revs still sticking in the rev range from 2-2.5k and stuttering at idle. Found this after I did 100 mile round trip on Saturday :( So thats £150 wasted in buying the part and having it fitted! However, thinking about it my car ran a little better after its little 'spirited drive' round Castle Combe a few weeks back but very quickly went back to normal after a day or so.

So, more research has been carried out by me and these symptoms are also seen from clogged intake valves and seems to be a massively documented issue, especially in the USA where the octane fuel they use it lower and does not burn as clean as our fuels, but still at about 60-80k even if a TFSI engine has been run on Super Unleaded all of its life it will still need de-coking.

These intake valves can be got at by removing the inlet manifold which with patience can be done in just under an hour. Here is a great PDF explaining step by step how to remove the inlet manifold (the PDF is for the K04 turbo upgrade kit but the first section is on removing the inlet manifold) - http://www.vividracing.com/catalog/productdocs/STaSISMTF0turboinstalltransverserev7_2.pdf

In this thread from another forum it shows the extent of the problem with before and after pics of the cleaning - http://forums.fourtitude.com/showthread.php?5493383-Intake-Valve-cleaning-at-77K-(Insight-amp-Pics)&p=74829604 - Also tells what tools they used to clean it.. Mainly stainless steel wire bushes, compressed air and small picks...

I am going to have a go at this myself after bank holiday if the my VAG specialist does not come back with a sensible price to do it...

[martziniuk]

Give this a go

http://www.mk5golfgti.co.uk/forum/index.php/topic,59368.msg665793.html#msg665793

I've got all the kit ready but need to get the bore scope up to do a before and after..... It's just getting time to do it :(

[R8MXX]

Give this a go

http://www.mk5golfgt....html#msg665793

I've got all the kit ready but need to get the bore scope up to do a before and after..... It's just getting time to do it :(

Thats got to be worth a go before a total dismantle! Thanks for the link