GolfGTIforum.co.uk
Model specific boards => Golf mk4 => Golf mk4 TDI => Topic started by: richandhazel on 27 September 2006, 04:01
-
Driving home from work this morning, an unusually exuberant run. Gave it some welly, accelerating hard and the turbo suddenly cut out and I lost soooooo much power! Slowed down going up hill :shocked:
I've had this on 3 previous occasions and you can fix it by switching the ignition off and back on again. I didn't bother this morning as I was so close to home but it always seems to happen when giving it some welly. I seem to remember reading something about this problem once; something to do with a 'N75' valve :undecided:
Anyone had any experience of this?
I guess my first POA should be to scan the boxes with VAGCOM and see if any fault codes have been generated.
-
Sounds like your car is going into 'limp mode'
mate at work has this on his TDI but he can't be bothered to get it fixed! Only happens to him if he goes over 90...........
VAG COM should throw up the fault, if it doesn't could it be the MAF? :undecided: i know they don't often thrwo up fault codes but are actually the cause of the problem :sad:
-
Definately not the MAF. I've changed that fairly recently and it did it before and has done it since.
-
been doing a bit more reading into this and found this over on ukmkivs.net:
Intermittent Limp mode on the diesels is often a small hole in one of the pipes under the bonnet, a symptom of this is it slowly getting worse over time and you being able to give it beans all the way to the redline yet 10 mins later motorway cruising it goes into limp mode.
You need to get it on vag-com, if its a pressure deviation message or something similar it will almost defo be a split hose somewhere
Good luck
and this too:
You'll find this is a common issue with the 110 TDIs - happened around 80mph, right? In order of expense, it'll one one of a few things...
The vacuum hoses going to the N75 boost control valve will have cracked perished (especially the small top one)
The N75 valve itself has gone
The hose between the intercooler and turbo has cracked / perished
the EGR valve and inlet manifold is clogged (although you can do this yourself - vwvotex have a good guide on it)
The vane lever on the turbo needs lubricating
The turbo needs a refurb / replacement
I would clean out the EGR valve and inlet manifold anyway as they have a habit of becoming clogged - especially if you run a remap or tuning box but more so with a tuning box.
Hope that helps
-
Brilliant :smiley:
I think I'll try VAGCOM first and see what that throws up.
I'll let you know how I get on. Thanks for your help.
-
No worries.
Hope the problem is the least expensive one :smiley:
-
It happened to me about 3 months ago, nice drive home with some hard use of accelerator, slowed for a corner then wow, it switched to limp home or SDi mode. Drove home with it like this (about 2 miles) and all OK on re-starting. Never investigated any further but probably should.
-
Tried to make it do it again tonight but it wouldn't do it.
It seems to be after a motorway run at a constant speed and then accelerating hard after leaving the motorway.
-
Found this article this evening, makes interesting reading and definately some food for thought:-
http://forums.tdiclub.com/showthread.php?t=145663&highlight=n75
-
The N75 valve is mentioned a few times there, I did find info relating to this valve when it happened to me. Planning to fit a new water pump soon and clean the EGR, will have a further look then.
-
Overboosting leading to a temporary limp-mode is very common in TDI's. It's usually down to a split vacuum or boost hose.. good luck finding which one :wink:
-
I'm optimistic that I will find a ruptured or disconnected vaccuum hose somewhere. I want to vagcom it first.
Trouble is I can't move out in the garage! Immediately prior to our wedding we cleared out the house and everything got dumped in there. Need to spend a few days clearing up :rolleyes:
-
Ok, did a scan this afternoon and look what I have found:-
Address 01 -------------------------------------------------------
Controller: 038 906 018 BM
Component: 1,9l R4 EDC G400SG 2115
Coding: 00002
Shop #: WSC 31414
1 Fault Found:
17958 - Charge Pressure: Control Deviation
P1550 - 35-00 - -
-
So what does that mean in English?? lol
is that a leak in one of your pipes?? :undecided:
-
Well I read back through your post earlier in this thread and this was something that you found:-
You need to get it on vag-com, if its a pressure deviation message or something similar it will almost defo be a split hose somewhere
So I'm hoping thats the case......
-
Hmmmm, this is a handy resource:-
http://wiki.ross-tech.com/index.php/17958/P1550/005456
http://wiki.ross-tech.com/index.php/Category:Fault_Codes
-
Some good information there.
-
I'm having the same problem with my TDI. Goes into limp mode when I reach around 75/80 mph. :angry: vagcom also showed a pressure deviation.
Did you find a split pipe?
-
Yes I did. Very tiny hole in the hose that leaves the turbo and enters the precooler. Replaced the hose for £20 and it hasn't done it since.
Just serviced a 130 Golf TDI that had the same problem. Again, I found a leak only this was more serious and in the hose theat enters the EGR valve/inlet manifold. It is one of the newer type hoses that has the 2 lugs and a circlip. One of the lugs was broken so the hose had partially twisted out. Use could even see the black oil deposits all over the bulkhead where it had been leaking so badly. He reckons he now notices an improvement in performance now that we have replaced it. Oh and it hasn't done it since.
With his you could actually hear it leaking so its worth having a good listen whilst driving. Maybe even remove the upper engine cowl.
-
Thanks for that......will give them all a check!
-
Mine has done it 4 times in the past 2 weeks, I will check for faulty hoses/connections first.
-
My PD150 (revo remapped) has got a similar problem, only I can't seem to reset it by turning the ignition off and on. When I cruise in any gear the engine stutters slightly and if I give some beans I leave a thick black smoke cloud behind me.
Power is massively reduced, and it seems to take ages to get up to 30mph!
I've replaced the MAF monitor, but this seems to have made little, if any difference. Had a bit of a shifty last night for holes, leaks and loose pipes, but had no joy (but it was dark).
Gonna get VAG-COM on it tonight, hopefully that will shed some light.
-
That sounds like a bad leak, where the hose has completely detatched. I've worked a 150 that popped an inlet hose to the precooler and as soon as you touched the throttle thick black smoke came out the back.
Have a look under the bumper forward of the front wheel, drivers side, at the precooler.
-
That sounds like a bad leak, where the hose has completely detatched. I've worked a 150 that popped an inlet hose to the precooler and as soon as you touched the throttle thick black smoke came out the back.
Have a look under the bumper forward of the front wheel, drivers side, at the precooler.
i had a similar problem on my 150 except it was the hose connection to the intercooler, when mine went i had no power over 2000 RPM
if i was you get the car jacked or raised up and check all the connections. i replaced the hose clips on mine too, these are 30p each from the stealer.
-
Cheers for the info guys I'll take a proper look in the light when I get a chance (damn winter days).
Here's what VAG-COM is telling me:
17964 - Charge Pressure Control : Negative Deviation P1556 - 35 - 00
Seems to tally with what you're saying. Although, went out for a run tonight (mainly just to see if I could re-create the fault after clearing it...I could) and it stopped smoking, still no power tho.
Hope it is a bad leak, should be easier to spot *crosses fingers*
-
Sorted it!
Thanks for all your advise guys. Turned out to be the pipe on the passenger side of the intercooler, it had come almost half the way off. Reseated it and put the clip back (which seemed a bit feeble) took it for a run and normal performance has been restored...yay!
Give yourselves a pat on the back!
-
Sorted it!
Thanks for all your advise guys. Turned out to be the pipe on the passenger side of the intercooler, it had come almost half the way off. Reseated it and put the clip back (which seemed a bit feeble) took it for a run and normal performance has been restored...yay!
Give yourselves a pat on the back!
thats the same as what happened to mine, on mine the bit which sticks out and holds it in place against the clip had worn away so it literally popped out if the pressure was too high. I'd recommend you give the hose a quick inspection just to make sure its not worn down.
Good to hear that its working again though!
-
When I re-seated it I had a good shifty at the pipe to see why it had come off, but couldn't see anything up with it. The only thing that concerned me was the flimsy clip, it was possibly to far along towards the end of the pipe.
Plus I've only just managed to get my hands clean :wink:
-
I don't believe it. First time in ages, my turbo stopped working this evening :angry:
Steady 70/80mph all the way home, came off the motorway and on to the B roads and it was gone........zero acceleration. Stopped, switched off/on and it was fine.
Funny thing though. Earlier this evening I was checking the car over as Hazel driving 340 miles in it tomorrow. I moved/looked at a vacuum hose that looked like it had chafed slightly. I didn't think it looked too bad but it now seems like too much of a coincidence.
I bought 2m of vacuum pipe today to replace all the Polo pipes. Think I'll have a go at the TDI whilst I'm at it.
-
Hi
Did you resolve this?
-
No, but it hasn't done it since. Still have the vaccuum hoses to replace but I've been a little tied up with doing the head gasket on the Polo.
-
Think finally got mine fixed! Touched red line in 3rd and done 30 motorway miles and not one 'limp'!
It would have gone into limp at around 3000 revs or 75+mph previously.
Took it to a VW specialist in Barnsley today who did a fulll vagcom and amongst other little things it came up with a 'positive deviation'. He had a quick look around and has replaced a hose 'under RH head light correctly' which was loose and he thought had become dislodged when timing belt was done. Paid £65 and all seems well...................chuffed!
-
Hi
Just catching up now the site has been re-vamped.
I have the same problem with my mk4 gt tdi 130golf, its only just started on 2 occasions.
All with the exact same symptoms.
I have re-placed the maf(with a genuine vw 1),
Cleaned out the EGR valve and inlet manifold (easy if you follow the step by step instructions postedon here)
The hose from the Intercooler and turbo has been up change.
Going to do a diagnostic check at my local garage on the car tomorrow dont have access to VAG. Will post findings.
Think this leaves me with turbo worries :cry:
Just curious to know if your car it chipped or re-mapped as i have found it seems to happen more to cars that are or am i being paranoid?????
Will try and look at the N75 boost control valve and hoses while im at the garage.
Fingers crossed
-
Hi all, i have a '02' 130 gt tdi. Am i wrong in saying the pipe that goes from the bottom of the intercooler goes to the turbo and is made from alloy?
-
Hi all, i have a '02' 130 gt tdi. Am i wrong in saying the pipe that goes from the bottom of the intercooler goes to the turbo and is made from alloy?
i thought only the tdi 150 had the intercooler
do you mean the pipe that goes infront of the engine?
-
No there is an intercooler on the drivers side behind the front bumper. A pipe comes from the bottom of it and into the drivers side arch and disapears into the engine bay to the turbo im guessing.
-
No there is an intercooler on the drivers side behind the front bumper. A pipe comes from the bottom of it and into the drivers side arch and disapears into the engine bay to the turbo im guessing.
well i'm confused as i thought only the 150PD's had the inter cooler, i expect one of the guys with 130's will be able to confirm this.
the inter cooler on mine is located on the passenger side, behind the bumper and in front of the wheel arch. i'm not 100% sure which way the pipes run, but the only ones i've seen are a thick semi flexible plastic / rubber with metal end connectors. there is an ABS moulded piece that runs in front of the lump and then back to pipe and into the turbo. i've never seen the pipes that run to the drivers side and complete the loop, but would assume they are made from the same stuff.
-
the 130 and 150 both have intercoolers.
The 130 is a side mounted job and the 150 is a Front mounted intercooler
-
the 130 and 150 both have intercoolers.
The 130 is a side mounted job and the 150 is a Front mounted intercooler
thanks for clearing up the confusion, i expected you'd know the answer!
-
the 130 and 150 both have intercoolers.
The 130 is a side mounted job and the 150 is a Front mounted intercooler
thanks for clearing up the confusion, i expected you'd know the answer!
:tongue: lol - i must be spending too much time on here then :laugh: