MK5 Golf GTI
All Things Mk5 => Modifications & Technical Area => Technical Workshop => Topic started by: Mahooo3 on October 03, 2012, 06:29:11 pm
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Hi
Drove my ed 30 out of town to day and in 4th gear @ just over 2000rpm i planted it until about 4000rpm. @ 3000rpm (when the turbo starts to really kick in) I heard this squeiling/whining (like a small belt slipping) along with the usual woosh of the turbo. The power also started to die off briefly then came back on, until 4000rpm when i shifted up a gear. After this I slowed off and did this a few more times to see if it would pass. The squeil/whine is still there and the power is smoother again but still not right.
The car has a bluefin stage 1 and has done for at least 20,000 miles. The previous owner tried to sell me an updated version of the dump valve which he took off the car before trading it in. Could the original dump valve be the problem, hence the dip in boost/power??
Any help or advice would be much appreciated!
Thanks
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It sounds like it could be your diverter (dump) valve. Do a search on here as there are loads of posts about this issue and the symptoms/problems you may experience as a result.
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Try this link http://www.mk5golfgti.co.uk/forum/index.php?topic=44709.0
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Thanks :happy2:
I think I'll try replacing the dv. Any idea on the price of a version d?
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Thanks :happy2:
I think I'll try replacing the dv. Any idea on the price of a version d?
Any reason for the D?
I'd go for the Revision G mate....Part number 06F 145 710 G. (about £40).
Carlo :smiley:
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Just because the guy who had the car before me is selling it, whats the difference?
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G is latest revision, ment to have a better seal over the D
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OK...
So I took apart the DV tonight and its a revision G, Checked the diaphragm and thers no sign of dameage looks fine.
What could be the problem??? :scared:
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After a test run, whe whine/squeil is still there and the turbo still isnt as smooth between 3000 and 4000 rpm
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Tonight I got the car up on the ramp to have a look round the hoses to see if there was anything untoward...
There is a slight oil weep at different joints on the main turbo pipes. If I am incorrect with naming the pipes please say...
This is the Joint at the Inlet to the intercooler(???)
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fq678%2Fmahooo3%2FIMG_0671_zps062328df.jpg&hash=7451a9498b683a3cdb6d0d875fea3d159f6b2427)
This is the joint just back upstream from the inlet
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fq678%2Fmahooo3%2FIMG_0675_zpsbedc3632.jpg&hash=509ad8e82779cf65645e28433bd7f0cd03e92ddf)
This is the intercooler outlet joint(???)
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fq678%2Fmahooo3%2FIMG_0673_zps5ca26225.jpg&hash=e9f1b3adba242e29eba0538446df1730b78bf3f9)
And here is a few pics of the DV...seems ok to me...
Sealing face on the valve is in good nic. Never took a pic of the diaphragm but its fine too.
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fq678%2Fmahooo3%2FIMG_0676_zpsa633562f.jpg&hash=ae5aeae1a239c8810b74fa3d325930307812ffab)
This was a bit concerning but I'm assuming its a split bush thats meant to be split and it hasn't cracked! You can see in the pic that there is a bit of wear where the split is, possibly the valve stem rubbing a bit???
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fq678%2Fmahooo3%2FIMG_0677_zpscba3db6d.jpg&hash=13f1f42eaa04436da3596f9804d501330d395eeb)
And again from the top
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fq678%2Fmahooo3%2FIMG_0678_zps6fbd1675.jpg&hash=ad3bc104775a1d2e581ff7ad098a52f61b75a7c6)
Apart from this, my inexperienced eye, could see nothing else that looked potentially problematic. Could someone please tell me if any or all of these things are normal?? Too me, if oil can weep from those joints then air must do aswell so that could be the issue?? and also if the valve stem/shaft is rubbing on the bush this could be restricting the valves movment and therefore won't be functioning normally???
PLEASE HELP!!! :scared:
Thanks :happy2:
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Got my mate to scan for faults on vagcom and this is what came up...
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fq678%2Fmahooo3%2FIMG_0679_zpse8f212d6.jpg&hash=3933f8a2ab6c5e6f982ab8aab9745ff3844857e0)
Does anyone know or has had/seen this falt before? According to vagcom its only happened twice but its a lot more than that!
Any ideas on whats up with the car???
Thanks
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Just found this on rosstech website. Where is the charger pressure control located? Hope its not the Turbo! :scared:
16683/P0299/000665 - Boost Pressure Regulation: Control Range Not Reached
Possible Symptoms
Reduced Power Output
Limp Mode
Possible Causes
Hoses/Pipes incorrect connected, disconnected or leaking
Charger Pressure Control defective
Turbocharger faulty
Diverter Valve faulty
Possible Solutions
Check Hoses/Pipes to/between Components
Check / Clean / Replace Charge Pressure Control <<<<< WHERE IS/WHAT IS THIS???
Check Turbocharger
Check Diverter Valve
Special Notes
When found in 2.0l TFSI:
Check Boost Pressure Control Valve (N249), for cracked rubber diaphragm. A new/optimized Valve is available under Part # 06H-145-710-D (or newer).
RoW vehicles see: TPI 2016331 for details.
NAR vehicles see: TSB 01-07-70 or 2013392 for details.
When stored in conjunction with misfire codes and/or fuel trim faults see the notes associated with the following faults regarding PCV failure: Crankcase Breather Valve
If the Turbocharger is faulty due to mechanical / internal problems or the exhaust system is restricted (typically the Catalyst) this fault may be the end result.
When found in VW Golf/Jetta (1K): 2.0l CR-TDI (CBEA/CJAA):
Verify the mechanical part of the Exhaust Valve Control Module (J883) is not siezed or binding.
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I've came to the conclusion that the N75 is the charge pressure control. I can't get at it due to the turbo beaing right up against the chassis beam the runs along side the engine. Has anyone ever had to clean/replace one of these on a K04 turbo? Any help would be much appreciated!!!
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Any Update matey?
It doesn't look like you have had much help here :ashamed:
I wish I could be of assistance but I really can't help when it comes to mechanics.
Give me a "How to" video on the laptop and I'd prob be able to strip a car and put it back together. But god forbid, if the laptop broke :surprised: :innocent:
Come on Lads…..Surely someone here has some advice/opinions on the fault.
…..anyone??? :popcornsoda:
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Fraid not. no worries! I'm going to hav a look and see what needs to be done to get at the n75. If it gets any worse I'll take it to a garage. It'l be one of these faults that you are £100's down the line with the garage and they're still none the wiser lol! Would appreciate it if antone has had to do anything with their n75 and how to get in about it... :happy2:
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Reinstall the oe map and see if the fault codes reappears. If it does then it is a mechanical issue. If it doesnt it will be a software issue. Have you fitted a new pcv valve as that can cause the same fault code of the check valve is slightly sticking open.
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Have you read this thread?
http://www.mk5golfgti.co.uk/forum/index.php?topic=35128.0 (http://www.mk5golfgti.co.uk/forum/index.php?topic=35128.0)
Sounds similar to what your getting. Might be worth giving that dude a pm?
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Cool will give that a try, will be great if its just the software! Nope original PCV. I've checked its ok by removing the oil filler cap. It ran rough when I did this so I'm assuming that means the PCV is ok??
Just had a look at the link. sounds sort of similar except the noise I'm getting isn't a flutter. More like the wastgate is open briefly rather than open/shut/open/shut.
A mate told me today it sounds like I'm getting a boost spike. Which would mean that everything was working as it should be as the system is protecting itself from overboosting by opening the wastegate. So...what would cause a boost spike? The software? It's been perfect the last 10k i've had it on for, why start spiking now?
Initialy I thought my problem was either the N75 (not checked yet) or the charge air pressure sensor G31 (not checked yet) but now that my mate said this I have no idea! :scared:
Any thoughts anybody???
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I've been running with the original software for 2 days now and tomorrrow i'll be getting a look at it with vagcom to see if its still throwing up the same boost pressure regulation fault. TBH the car is that dead now without the bluefin I would'nt notice the dip in power ha! Looking at the rev counter during full throttle everything seems perfectly linear and normal and you cant feel it surging anymore so I'm guessing it just happens with the higher bosst pressure on the bluefin software.
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I had once or twice a slight hesitation on full throttle with it. Only happened a couple of times.
What fuel you running it on?
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Running it on super unleaded 98. There is only two petrol stations within 30 miles of me that does super lol!
Put the map back on last night and cleaned what I think was the G31 Charge air pressure sensor (I'll put pics on tonight). It was slightly damp with oil. After a test run it's safe to say the problem is still there but now I think there is a new problem...the clutch is starting to go! FML! :sad1: