Post by: goku4ever on October 09, 2017, 04:30:04 pm
I've recently purchased a 06 gti dsg. I've recently noticed the car is losing power after 55mph and there's some sort of loud whistle noise. From standstill the car pulls nicely without the weird whistle type of noise.
The car has been remapped. Looking at the invoices from the previous owner, it has Dv G version, roughly 2yrs2\8k miles ago. Oh yeah, it has the rtech pcv delete and rear pcv also blanked.
I'm no mechanic but can carry the basic jobs.
Your help and advise is greatly appreciated.
Post by: tyc00n2 on October 10, 2017, 11:35:10 pm
Does the car have an aftermarket intake?
Post by: pudding on October 11, 2017, 12:20:03 pm
The turbo should be silent unless it's running an aftermarket intake, is running way more boost pressure than standard, or has a boost leak.
Post by: goku4ever on October 11, 2017, 12:34:05 pm
Do you notice that rev's will not want to go beyond about 4k? if so the car would most likely be going into a limp mode. As you pointed out the car has the latest DV and the PCV has been sorted. Taking off the DV is only a 10 minute job so i'd take it off and check the diaphram anyway just to see. Other than that check all your piping to the intercooler and all the hose clamps are tight.
Does the car have an aftermarket intake?
Not sure if it revs higher than 4K, will have to check. Having said that, I had a scan and no errors.
The car has standard intake.
Picked up a DV g revised and a cam follower (no record to prove it's been done). Will check DV and if it needs replacing I have one ready.
Post by: Dan_FR on October 11, 2017, 01:12:41 pm
Post by: AJP on October 11, 2017, 05:29:27 pm
I reckon I was losing about 20bhp at least (according to the arse dyno) on the old rev C. Swapped for a G and it was like a mini remap.
That was a couple of years ago, and it's been running quite a bit of boost since, and it still pulls hard. I might be one of the lucky ones - plenty of people don't get much life out of a rev G, even though they hold boost nicely until they start to fail. I am tempted to put a new G or maybe a DV+ in soon though, just for peace of mind.
Post by: goku4ever on October 12, 2017, 06:58:09 pm
What else can it be? No errors on VCDS
Post by: AJP on October 12, 2017, 07:16:01 pm
Removed the DV and it was C revision but no rips on rubber. As I had G revision, went ahead and changed it, but no luck. Loud whistling screeching noise and no power.Damn. I lose a hypothetical tenner then. Looks like some further investigation is required...
What else can it be? No errors on VCDS
A screeching noise screams boost leak to me (pardon the pun). The intercooler hose connections are another weak link. Oil around a joint can be indicative of a bad seal.
If you get to the point where you've physically checked everything you can it might help to do some logging with VCDS. This goes further than the usual fault code troubleshooting. Often there's a fault or two that don't actually throw a code - so live data logging can tell you more.
@Pudding & @Dan_FR both know their stuff with logging, and can hopefully tell you the specifics.
NOTE... Can somebody properly tag Kev and Dan for me please, I'm yet to find a way of doing it on Tapatalk. Cheers :)
Post by: MIJ_JAGGER on October 12, 2017, 07:53:37 pm
Post by: Dan_FR on October 12, 2017, 09:00:58 pm
As for logging, have a look here and start with round 1: http://www.goapr.co.uk/support/datalogging.php
Post by: goku4ever on October 13, 2017, 12:04:57 am
I’m averaging 14mpg, normal city driving. 70miles from £20 fill. poor??
AC not working ( pressure sensor needs replacing)
Outside temperature sensor the one behind front bumper grill is missing.
I’ll have to find someone with VCDS for live logging and check block 032
Post by: MIJ_JAGGER on October 13, 2017, 09:28:21 am
Don’t know if any of this will help to find the problem;If the ambient sensor is missing then you'll probably have a crazy reading which means the AC compressor won't run.
I’m averaging 14mpg, normal city driving. 70miles from £20 fill. poor??
AC not working ( pressure sensor needs replacing)
Outside temperature sensor the one behind front bumper grill is missing.
I’ll have to find someone with VCDS for live logging and check block 032
When my ambient sensor wasn't working I had a reading of -35c, soon as that got fixed the AC was working
Post by: goku4ever on October 13, 2017, 10:13:02 am
Don’t know if any of this will help to find the problem;If the ambient sensor is missing then you'll probably have a crazy reading which means the AC compressor won't run.
I’m averaging 14mpg, normal city driving. 70miles from £20 fill. poor??
AC not working ( pressure sensor needs replacing)
Outside temperature sensor the one behind front bumper grill is missing.
I’ll have to find someone with VCDS for live logging and check block 032
When my ambient sensor wasn't working I had a reading of -35c, soon as that got fixed the AC was working
For some reason mine changed between between 17-18c. And I don’t even have a sensor, plug is just loose
Post by: pudding on October 13, 2017, 11:22:44 am
Take that as worst case but it really needs to get to a workshop for more in-depth analysis.
Lol, love the pudding reference :grin: I am a bit partial to a syrup sponge :laugh:
Post by: goku4ever on October 13, 2017, 02:02:59 pm
Post by: pudding on October 13, 2017, 05:40:27 pm
Are your symptoms anything like this? http://www.mk5golfgti.co.uk/forum/index.php/topic,114177.0.html
Post by: goku4ever on October 13, 2017, 06:30:37 pm
Be sure to report back what the problem was :happy2:
Are your symptoms anything like this? http://www.mk5golfgti.co.uk/forum/index.php/topic,114177.0.html
Will def report back.
Nothing like what’s mentioned on the linked post. I’m not losing coolant nor oil. If I put my foot down you can hear the turbo nicely, but as the revs go higher that’s when the problem start.
Spoke to Rtech to try and find a bit of history on car, and guess what, it was previously mapped on k04 conversion but the person I bought the car is denying it. DSG has been mapped, VCDS shows the figures changed. My main concern is if it’s still on K04 map? And if not, who remapped it when it was reverted to k03, def not rtech.
Post by: goku4ever on October 18, 2017, 03:54:01 pm
Loud whistling / screeching when you put your foot down and no power, plus sh*te mpg........hmmmm. If it were me I would be dropping the downpipe to check for turbo shaft play. Obviously internet advice is pure speculation without seeing the car, but it sounds to me like the turbo's compressor wheel is rubbing the housing. It would certainly explain the complete absence of any power.
Take that as worst case but it really needs to get to a workshop for more in-depth analysis.
Lol, love the pudding reference :grin: I am a bit partial to a syrup sponge :laugh:
You were absolutely spot on. Had the car checked and the turbo wheel is rubbing against the housing. Boost is 1.7.
The car was previously mapped by Rtech on K04, the guys that looked at the car believe that its still running on a K04 map (currently car has k03 turbo) and that could be the cause.
What are my options? get a new turbo and map?
Can the current turbo be rebuilt?
Thank you
Post by: pudding on October 18, 2017, 05:26:35 pm
As luck would have it - http://www.mk5golfgti.co.uk/forum/index.php/topic,114674.0.html
That would be a better option than rebuilding it and you can carry on running it as a KO4 configuration, but perhaps get a remap to lower the boost and the new turbo will live a lot longer.
Post by: goku4ever on October 18, 2017, 06:18:48 pm
Think i might source a K03 and get a remap
Really disappointed as i only had the car for a very short period, but love it to bits.
Post by: AJP on October 18, 2017, 09:04:53 pm
Thought about going the K04 route but cant afford it right now as im guessing i'll need all the other bits for it in addition to the turbo for a conversion (aprox £1.5k).Don't despair mate. As bad as it seems many of us on here spend more money chasing more (apparently) minor issues. Point is, at least you know the issue.
Think i might source a K03 and get a remap
Really disappointed as i only had the car for a very short period, but love it to bits.
You might be able to pick up a used and healthy k03 for a steal. A k04 is more desirable and commands a price. Was always the way with the 1.8T scene and it's the way now.
My k03 has done 80 odd k, and it's still sound. It wouldn't be any less sound on another car. I'm not trying to sell you mine, but sourcing a cheap k03 to get you running might make things a bit smoother.
Post by: goku4ever on October 19, 2017, 10:34:02 am
Does anyone know the part number for the K03 for BWA? Called TPS n the quoted me 876 plus VAT. They refused to give me the part number.
Currently looking at two on eBay, 06F 145 701 H from an Audi TT and one from a BWE engine, will these fit on the Gti?
Thank you
Post by: Dan_FR on October 19, 2017, 10:39:30 am
Catching up on this post however, Why not try and determine what map you currently have, what hardware i.e. injectors, MAP sensor, rail pressure sensor etc. as it may not be that much more expensive to find a used K04 for £350-400ish and put the car back to how it should be (and may be mapped for!?) If you are seeing 1.7 bar of boost then you definitely still have software calibrated for the K04 3 BAR Map sensor as the K03 sensor will only read 2500mbar absolute pressure (i.e. 1.5 Bar of boost)
1.7 bar of boost would likely kill a K03 pretty quickly
Post by: pudding on October 19, 2017, 03:35:20 pm
Hmmmm. Anyway...... If you want to keep it as a K03, perhaps consider a K03 hybrid, which will have proper 360 degree thrust bearings in it (stock are 270 or something naff like that), not to mention better turbine and compressor wheels, so will be a lot better than a plain vanilla K03. Situations like this are a good opportunity to improve, upgrade and come out the other side better off, performance and reliability wise. Run it up to the max of 1.5 bar as Dan said regarding the MAP sensor and all will be golden.
Post by: doylebros on October 19, 2017, 05:57:17 pm
Thanks AJP
Does anyone know the part number for the K03 for BWA? Called TPS n the quoted me 876 plus VAT. They refused to give me the part number.
Currently looking at two on eBay, 06F 145 701 H from an Audi TT and one from a BWE engine, will these fit on the Gti?
Thank you
Click on the relavant item number 1
http://www.oemepc.com/vw/part_single/catalog/vw/markt/RDW/modell/GOLF/year/2007/drive_standart/614/hg_ug/145/subcategory/145065/part_id/3687217/lang/e
Which will go to another page click Europe and it will show all the models and years it's fitted to, hope it makes sense.
Post by: goku4ever on November 14, 2017, 06:28:14 pm
So i had my car turbo checked again by a well known person (in the TDI scene) and he said the turbo is fine and not actually playing and no boost leak. The previous owner did have a lot work done to car, at one point he had 360-370bhp on K04. According to the tuner, the car is running on a tuned ed30 map (didnt know this at the time of purchasing the car).
So went a head and left the car with him to be remapped. Car currently has a decat and RAMAIR induction kit. From the data he gathered while mapping it, he believes the car is pushing approximately 280bhp. Car is running and pulling a lot better now but the noise i previously described is still there, but not as loud as before.
While tuning the car, he was able to get the car to aprox 300bhp but the injectors were maxed. He believes the turbo might be a hybrid as it was producing more than it should and believes it can do more if the injectors were to be upgraded.
I'll definitely get it on the rollers when i get the chance.
Anyways, do you think if I was to get S3 injectors i'll see any benefits? Is there anyway i can actually confirm i do have a K03 hybrid? I've read S3 injectors are pointless on a standard K03!
Thanks
Im averaging 17mpg now where as before it was 14mpg. Still not great but not sure what i should be getting after a remap. Mainly city driving.