A3 2004 2.0tdi sport juddery under load

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deano1351

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Hi guys an gals, im actually asking for a friend who hasnt been able to get an answer from many people. The car is as above, it was chipped over a year ago to 170bhp i believe and was fine, it also had a new turbo last year and a new clutch and dual mass flywheel, the problem is that when you put the engine under load ie 6th gear at about 60mph and put your foot down it judders back and forth, if you do it up a steep hill say in 4th at around 30mph the judder gets quite violent, the car has been on the audi computer and shows no faults, a mechanic suggested a problem with the injectors not seating properly and others say its the dmf or turbo which have already been changed, its on about 140000 miles so is quite high, has anyone experinced this problem as its becoming a nightmare :think:
 
Hi Deano,
Just so your friend doesn't feel left out i'm experiencing the same problems. :mad:
I've got the 1.9TDi engine (only 55k miles but also chipped). The clutch and DMF was only changed a matter of 1000/2000 miles ago but as i said i get the same thing. It only seems to be when revs are between 1.2k and 2k rpm altho there does appear to be a slight vibration when crusing at motorway speeds.

I'll be popping back to the VAG specialist who completed the work for me to try and diagnose.... let me know how your mate gets on & i'll report back.

Any thoughts from anybody else? :sos:
 
Its definatly a weird one, even the guys at audi are stumped, one mentioned that the cam lobes are worn and a new camshaft would be needed, that sounded strange to me as it drives fine the rest of the time with no rattles or anything like that, he also said that if it didnt solve the problem then my mate would still have to pay full price for the camshaft plus labour, not cheap considering it sounds like a guess. Its actually on its second DMF now which i never knew and still got the same problem!!
 
With it being the same issue as mine I'd be surprised if it was the cam lobes.. I say this because i wouldn't expect mine to be this as i received a new engine under waranty around 16k miles ago. (thats if the camshaft wasn't re-used!?)

That said... who knows with Audi! It seems like alot of their turbos, flywheels and clutch don't last passed 50K! Tbh that's all i'm waiting for then and at that point i'll have mechanically a virtually new car! :whistle2:

edit: a new turbo that is! :ermm:
 
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Looks like nobody knows, these must be the only two cars that have ever had it haha il post up when i find anything new out :think:
 
Hi the problem described sounds like it could be a fuel pressure fault . Low fuel pressure under load. I would advice to get this checked out. I have come across several 2.0 TDI's with the same fault you describe. The tandem pump doesn't supply the correct level of fuel pressure so causing a misfire / judder. Another link to see if the tandem pump is faulty is to check for oil in your fuel , remove the fuel temp sensor and see if it clean or dirty (full of oil ). If oil is found this is most likely to be from the tandem pump which mix's engine oil with fuel. On the vehicle's i have repaired i have replaced the tandem pump, the fuel filter and cleaned the fuel temp sensor. No fault is stored in the engine control unit.
 
Hi there i had a the same on my 2.0 tdi dsg took it to audi put it on the computer "no fault found". After they took it in for 2 days they worked out that after the cam belt had been changed the injectors were out of time £170 later it is as good as it ever was.
 
Thanks for your advice guys... it appear for me there has been two demons at work....

Turns out that alot of the vibration at motorway speed i've been getting was wheel wobble from a rear wheel! Having removed the offending wheel (and fitting the spare... lol) all is well.
The judder at low rpm is still there. I've checked the fuel temp sensor and that was clean so i've stuck some Redex in with a full tank to see if it helps to clear possible blocked injectors.
I've covered 70 miles over a course of 4 stop start journeys and the problem seems (??) to have reduced slightly.
I'm due a service in 800miles which includes the usual plus fuel filter and this one is a cambelt etc, so i'll see what my VAG Specialist has to say and post back!
 
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I have a similar issue but I'm not sure if it is exactly the same. In my case, I find that it is not so much when the car is under load but just when I floor it in 5th or 6th gear, no matter what speed/RPM I am doing. It doesnt really shake the entire car, I just feel it through the steering wheel... I was thinking it could be a tyre but then if I go the exact same speed and floor it in 4th then it doesnt do it so it cant be anything to do with that.
 
Thanks for the comments guys, some different things to look at there, il pass it on to my mate and let you all know what happens, cheers
 
Ok sorry to open an old thread but the problem has been solved on this one, it ended up being the injector seals, after lots of research it was decided that the tandom pump could also have been contributing so this was changed as well, it was fixed by M.C diesel services in Luton and the guys knew what they were on about, much more so than the audi "specialists" who seem happy to charge but not very good at fixing things, the tank pump was also very low on pressure and also changed which was the reason behind the time it took to fire up, when the tank pump was removed the inside of the fuel tank was drenched in oil and needed cleaning out, much better now and the car pulls strongly at very low revs up hills with no juddering or struggling at all, its like a new car :icon_thumright:
 
just started having the same engine syptoms ,sometimes the car will run fine for miles sometimes it misfires and judders from cold , there is oil in the fuel as a suspected fuel pump it was changed along with the fuel filter and tandem pump , car has been sat for 4 days . turned key this morning fired straight up with the bad misfire , anyone know where to get the injector seal kit from online besides audi . one thing noted is car is on auto pilot as it drives with little to no accelerator control
 
audi upgrades
deano1351 said:
Hi guys an gals, im actually asking for a friend who hasnt been able to get an answer from many people. The car is as above, it was chipped over a year ago to 170bhp i believe and was fine, it also had a new turbo last year and a new clutch and dual mass flywheel, the problem is that when you put the engine under load ie 6th gear at about 60mph and put your foot down it judders back and forth, if you do it up a steep hill say in 4th at around 30mph the judder gets quite violent, the car has been on the audi computer and shows no faults, a mechanic suggested a problem with the injectors not seating properly and others say its the dmf or turbo which have already been changed, its on about 140000 miles so is quite high, has anyone experinced this problem as its becoming a nightmare :think:
Click to expand...

Deanno did you manage to find a fix to your issue? was it to do with the prop shaft? cheers Rob.
 
I had same problem Audi checked all injector s swapped still problem try changing the wiring loom that sits in top of engine as the cable sheath can break down and cause the injectors not to fire properly.
 
I'm so glad this thread has been resurrected! I have the exact same symptoms, have had a few people look at it, and they've not been able to give a definitive diagnosis. I've had the DMF suggested, but theres no flywheel chatter on idle or starting/stopping the engine :think: Mines only done 56k, and was remapped a few months ago by AMD, who very kindly rechecked it and found no fault codes!

Spoke to Audi today, who want to put it straight on their computer at a charge of 70 quid. I know they'll find nothing, so it'll be a complete waste of money.

I find Audimedics comments very interesting, so will be exploring those options next.
 
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