GolfGTIforum.co.uk
Model specific boards => Golf mk4 => Topic started by: paradisiac82 on 11 June 2017, 09:26
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Ok so this is not a MK4 Golf but a Mk1 Leon but they use the same bits so......I have had turbo issues with my 1.8T (APP 180BHP) (not boosting then making loud noises, then finally chucking oil out the exhaust) so I swapped out the KO3 for a KO3S with new seals/gaskets. Also fitted a boost gauge, which moves (although does seem to jump around a lot rather than smoothly going up, not sure if thats normal), but the car just doesn't feel quick on acceleration. The car has had the turbo fault from the day I got it so I have nothing to compare the power/acceleration to other than my old MK4 Golf 150bhp GTTDI (being diesel the turbo kick is obviously more than stock petrol due to massive torque). The N249 Solenoid does not 'Click' when running VAG-COM output tests so feel this is probably faulty. Any ideas what else could cause the car to feel a bit 'meh'?
Also, not sure if this is relevent but also from the day I got it, and still even with different MAF, the T/C light comes on whilst driving (not all the time but most of the time) and stays on until you turn the ignition off.
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Bypass the N249 as a starting point, it's not really needed. I would rather the vacuum from the engine control when the DV opens than the ECU thinking it knows best. It's worked for years on turbo engined cars like that so not sure why it needs to ECU controlled now.
Give that a go and see how you get on
Also clear all your fault codes (not just in the engine module, give it a full scan) and go for a drive on and off boost then see what codes you have after that and post them up
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Bypass the N249 as a starting point, it's not really needed. I would rather the vacuum from the engine control when the DV opens than the ECU thinking it knows best. It's worked for years on turbo engined cars like that so not sure why it needs to ECU controlled now.
Give that a go and see how you get on
Also clear all your fault codes (not just in the engine module, give it a full scan) and go for a drive on and off boost then see what codes you have after that and post them up
Whats the simplest way to byepass it short term?
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Run vac hose from dv to inlet
And then the other inlet to the fuel pressure regulator. Everything else is then bypassed and can be forgotton.
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I pulled the little hose on the DV off and blocked it up and turbo boosts as it should (well no obvious hesitating anymore)
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Dv is the culprit then
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Dv is the culprit then
Same thing with 3 differnt DV's :(
When the Boost Gauge was plumbed into that hose it had a constant vacuum so its definitely forcing the DV to be open all the time
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Split vaccum from inlet. Have you simplified the vac lines to eliminate all the stuff not needed
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ok....so N249 replaced and boost gauge moved to the dv hose and now not getting a vacuum reading getting a boost reading so all good so far. had a bit of a drive and acceleration feels a lot better and seemed to peak at around 18-20psi instead of 11-15psi. Was all town driving though so will need to take it out on dual carriageway tomorrow for some more testing but was still some turbo hesitation, most noticably in 2nd gear from 2-2.5k and 4.5-5k rpm.
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Right the pipe from actuator to n75 is it split?
Are the n75 lines silicone or still rubber also
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Right the pipe from actuator to n75 is it split?
Are the n75 lines silicone or still rubber also
Still the original hoses there. No obvious signs of splits and cant hear any hissing top end of car
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With it running im unsure if youd here on the actustor side. Have you got access to another n75 see if it solves hesitation.
If your in 4th and go full throttle from 2k Whats the boost gauge do. It should spike boost and settle back down
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With it running im unsure if youd here on the actustor side. Have you got access to another n75 see if it solves hesitation.
If your in 4th and go full throttle from 2k Whats the boost gauge do. It should spike boost and settle back down
Yeh I have another N75 somewhere. Will try and give that a go either later or tomorrow and will log it with VAG-COM
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Took it out for a run and with stock DV there was no apparent hesitation and these were my logs. Is it bad the actual is higher than the specified even though its not by a lot?
(http://i614.photobucket.com/albums/tt224/paradisiac1982/Seat%20Leon%20Turbo/Logs/Block%20118%20KO3S_zpszvmrwf5y.png)
(http://i614.photobucket.com/albums/tt224/paradisiac1982/Seat%20Leon%20Turbo/Logs/Block%20115%20KO3S_zpsaq0nbznt.png)
(http://i614.photobucket.com/albums/tt224/paradisiac1982/Seat%20Leon%20Turbo/Logs/Block%20002%20KO3S_zpsflu1lnlo.png)
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Not overly. Map sensor could be reading high.
If youve bypassed everything itll read different than specified.
Driving condition. Air temp all play a little part. Its got a ko3s on thats been played with hasnt it?
Id say if standard dv has sorted it then theres a problem with the uprated one. Have you ran a log with other dv to compare the 2 against each other
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The KO3S is stock as far as I know, it came from scrappy. I was told the car has been mapped when I bought it but as my KO3 was dead from day 1 I have no idea if this is true or not, other than that the only mod I am aware of engine wise is a cone filter.
I did do a log I will post it later as its on a different computer.
Also, it peaks at 1990mbar which according to google is about 28psi yet the gauge and torque app both show peak boost at around 18-20psi
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The place I was going to take it to on Weds and now saying the KO3S will need mapping in, but to do that I will need to buy bigger injectors as the logs show these are already on their limits...is this correct?
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Yeh injectors are different. The map wouldnt be overly off. They do need tweaking though.
I know a few agu owners with ko3s and standard injectors.
Take that info as you please.
Actual boist recorded by map i think should differ as your using the vac lines to read booat. I may have that wrong thoug. Been in a tdi too long where my boost gauge is inthe intake hose
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Yeh injectors are different. The map wouldnt be overly off. They do need tweaking though.
I know a few agu owners with ko3s and standard injectors.
Take that info as you please.
Actual boist recorded by map i think should differ as your using the vac lines to read booat. I may have that wrong thoug. Been in a tdi too long where my boost gauge is inthe intake hose
I have the injectors and FPR off of the car the KO3S was on, can I just swap them out?
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Fpr will be the same. You can swap the injectors. Depending on the inlet manifold. Not all injectors swap into manifolds. I think auq injectors will go in the 150.
You can only but try
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The injectors on the rail are 06A906031BA would they be different to the stock ones on the APP engine?
EDIT : Looks like they are the same https://www.onlinecarparts.co.uk/bosch-1150389.html
Injector (BOSCH)
Fuel Mixture Formation:Petrol Injection
Static flow rate at 3 bar, medium N-Heptane [g/min]:217
Resistance [Ohm]:12
Engine Code:APP, AUQ
to construction year:12/2000, 04/2004
from construction year:05/2000, 09/2000
from Chassis No.:1M..Y..100 001
OE Numbers
Proceed to comparison by OEM number
AUDI OE-06A 906 031 BA
SEAT OE-06A 906 031 BA
SKODA OE-06A 906 031 BA
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Then the injectors being maxed out wont make a difference in another mao. They may map it better. It depends whos mapped it 1st and if theyve mapped it properly or just turned the fuelling and turbo up
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So it went in and when I went to pick it up I was told it never went on the rollers as it was running lean so would melt the pistons....I needed to buy bigger injectors as mine (0280155897) were only 217cc and it needs 310cc with the KO3S. So I said I had the injectors off the car with the ko3s and when I did a part number search they were compatible with the APP engine.....he then told me without a remap they would melt my pistons. So I asked him to check part number of the other injectors....which he did......using eBay.....and used eBay to show specs of mine....both showing 217cc....so he then went go the draw to get his aum injectors that would solve my problem with a remap....guess what.....same part number as my spare injectors (0280156061).....which eBay told him were only 217cc!!! He then looked elsewhere and everywhere said both sets of injectors were 310cc...so will be fine with the ko3s...They started going on about the fuel pump being the issue then. Im lost now as to what to do. They showed me VAG-COM block 032 showing correction of 1.9% on idle and just over 20% under load, I haven't had chance to do my own log and they have left the N75 unplugged to keep boost down to save my pistons from melting.....it all seems a bit too much like they really wanted it in to get mapped so I don't know if they are that great. I have got a fuel pump to pop in it and see if that makes any difference to the fuel correction but I'm not hopeful
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Id take it somewhere else. Weak fuel pump will drop the fuelling down as the pressure will be lower. Id have thought that if pump was on way out it would be noisey.
The fpr on the other hand id swap for another 3bar one or a 4bar for a little more fuel. (What ive been told. Never tested though)
I can believe the aum and app engine have same injectors because there both 150bhp
The auq may have different injectors but i think there what you have as spares maybe?
It does sound like they wanted to get a bill out of you though and maybe sell you some injectors.
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Id take it somewhere else. Weak fuel pump will drop the fuelling down as the pressure will be lower. Id have thought that if pump was on way out it would be noisey.
The fpr on the other hand id swap for another 3bar one or a 4bar for a little more fuel. (What ive been told. Never tested though)
I can believe the aum and app engine have same injectors because there both 150bhp
The auq may have different injectors but i think there what you have as spares maybe?
It does sound like they wanted to get a bill out of you though and maybe sell you some injectors.
The APP is 180bhp. I have a spare 3bar fpr and now a fuel pump although the spare is 1j0919051c not 1j0919051h but I believe they are both the same. Would anything else cause it to correct fuel that much?
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Maf sensor. Lambda sensors.
So its same as an auq then. Acter i wrote that i thought they were 180 as its a leon.
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Well swapped FPR and the cone filter for standard air box/panel filter but VAG-COM is still showing its correcting at 4-7% idle and 15-22% on long figures so its running lean.......yet im only getting 200 miles out of a full tank so its definitely using too much fuel....what is going on?
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Whats the lambda doing?
N75 still unplugged?
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Whats the lambda doing?
N75 still unplugged?
no i plugged the N75 back in and VAG-COM was reading the same so think they were just talking rubbish to sound clever.
How do I check the Lambda?
Car is really popping through the exhaust, it sounds like its close to spitting flames if im honest.
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If its popping its over fuelling. You can cycle the lambda.
Or if you live data you should be able to check co levels and such.
This is a sh!t explanation. Haha
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If its popping its over fuelling. You can cycle the lambda.
Or if you live data you should be able to check co levels and such.
This is a sh!t explanation. Haha
Yeh I just don't get how it's saying it's running lean yet throwing fuel into the exhaust it's crazy
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Swap the injectors if you have spares. Can you live data the lamda cycle?
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Fitted new MAF and all good now. ESP light is still on permanently, only 2 fault codes are G200 and Brake Switch
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Maf sensors. Pesky things but it helps fuelling.
Atleast its sorted though mate
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Maf sensors. Pesky things but it helps fuelling.
Atleast its sorted though mate
yeh really happy :) ........now to make it FASTER!!!!!
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Sorry to jump on your thread, couldn't work out how to send you a message?
How do you get the graphs and logs I've been looking through vcds lite and I cant see how you do it?
I had similar issues on my wrx a few years back and want to be able to extract the same info out the golf.
Took it out for a run and with stock DV there was no apparent hesitation and these were my logs. Is it bad the actual is higher than the specified even though its not by a lot?
(http://i614.photobucket.com/albums/tt224/paradisiac1982/Seat%20Leon%20Turbo/Logs/Block%20118%20KO3S_zpszvmrwf5y.png)
(http://i614.photobucket.com/albums/tt224/paradisiac1982/Seat%20Leon%20Turbo/Logs/Block%20115%20KO3S_zpsaq0nbznt.png)
(http://i614.photobucket.com/albums/tt224/paradisiac1982/Seat%20Leon%20Turbo/Logs/Block%20002%20KO3S_zpsflu1lnlo.png)