VW T4 Forum - VW T5 Forum banner

1 - 20 of 24 Posts

·
Registered
Joined
·
225 Posts
Discussion Starter #1
Hi All,

I recently bought a T4 1.9 TD X Reg. After driving it around for a couple of weeks I've noticed it feels a little under powered. According to my brother in law who's owned one before it's the Turbo vanes sticking. You can hear the turbo but doesn't seem to be kicking in, especially on hills. There's no smoke or anything sinister looking. I've taken it down to Devon and West Wales with no problems.

Has anyone had similar issues and could suggest a solution? Ideally I'd prefer a garage to sort it as I haven't got the time to do a DIY job at the moment.

Any help would be appreciated.

Cheers
 

·
Registered
Joined
·
56 Posts
No T4 is fitted with a variable vane turbo, so it won't be that. 1.9TD's are a bit underpowered, I would suggest driving a another one before assuming there is something wrong with yours. The most common cause of a sluggish 1.9 is a faulty throttle cable, they are not too expensive from VW.

If there is no fault & you just want a bit more powe, there is info on here regarding adjustments to the fuel pump & turbo wastegate that will give a useful increase.
 

·
Registered
Joined
·
225 Posts
Discussion Starter #3
No T4 is fitted with a variable vane turbo, so it won't be that. 1.9TD's are a bit underpowered, I would suggest driving a another one before assuming there is something wrong with yours. The most common cause of a sluggish 1.9 is a faulty throttle cable, they are not too expensive from VW.

If there is no fault & you just want a bit more powe, there is info on here regarding adjustments to the fuel pump & turbo wastegate that will give a useful increase.
Ok, maybe I worded it incorrectly. I'm no mechanic, just going on what I've been told. The actuator arm isn't moving at all, I was told that this is because the turbo mechanism was clogged up and sticking.
 

·
Registered
Joined
·
398 Posts
do you have any problem getting up to 70-80mph on the flat, if not dont worry, as soon as you hit a hill on the motorway etc in a standard 1.9td you will be back to 60!
 

·
Premium Member
Joined
·
2,102 Posts
Ok, maybe I worded it incorrectly. I'm no mechanic, just going on what I've been told. The actuator arm isn't moving at all, I was told that this is because the turbo mechanism was clogged up and sticking.
Thats a wastegate and if it was sticking you would have better performance.
 

·
Registered
Joined
·
225 Posts
Discussion Starter #7
Thats a wastegate and if it was sticking you would have better performance.
Ok, so the should I be getting better or worse performance if it's sticking? As it is, the actuator arm is not moving. It's possible to move it manually but very stiff. Just showed it to the local small garage whilst giving it some revs, doesn't move. Obviously I'm going to have to take it to a VW specialist (not main dealer!) but I was wondering if this is a big job to rectify? I prefer to be informed before taking it to a mechanic.
 

·
Premium Member
Joined
·
2,102 Posts
It should be stiff as it will only move at the boost cut off pressure.

Stick an airline onto the pipe and pressurise up the actuator see if it moves.

anyway the wastegate on a 1.9 is normally closed and opened with pressure - so if its stuck you shouldn't get a lack of power.
 

·
Registered
Joined
·
225 Posts
Discussion Starter #9
It should be stiff as it will only move at the boost cut off pressure.

Stick an airline onto the pipe and pressurise up the actuator see if it moves.

anyway the wastegate on a 1.9 is normally closed and opened with pressure - so if its stuck you shouldn't get a lack of power.
Doesn't the actuator run on vacuum? It's stuck, we tested it with a vacuum pump. Also, hasn't it got a VNT mechanism which is completely different to a waste gate?
 

·
Registered
Joined
·
1,821 Posts
Doesn't the actuator run on vacuum? It's stuck, we tested it with a vacuum pump. Also, hasn't it got a VNT mechanism which is completely different to a waste gate?
No, how and why would a wastegate turbo operate by vacuum? It operates on pressure. The pipe coming from the compressor housing of the turbo should give you that clue...

As two other posters have already told you: this is a wastegate turbo, there are no vanes, and so it is not a VNT...
 

·
Registered
Joined
·
225 Posts
Discussion Starter #11
No, how and why would a wastegate turbo operate by vacuum? It operates on pressure. The pipe coming from the compressor housing of the turbo should give you that clue...

As two other posters have already told you: this is a wastegate turbo, there are no vanes, and so it is not a VNT...
Easy fella, keep your knickers on.
 

·
Registered
Joined
·
1,821 Posts
Easy fella, keep your knickers on.
Rather strange response. You have asked the same question repeatedly and received comprehensive and sound answers which you appear to ignore...I added some emphasis in order to clarify some of the more salient points. You are welcome to continue asking the same question, however I very much doubt that the answers will be any different...
 

·
Registered
Joined
·
225 Posts
Discussion Starter #13
Rather strange response. You have asked the same question repeatedly and received comprehensive and sound answers which you appear to ignore...I added some emphasis in order to clarify some of the more salient points. You are welcome to continue asking the same question, however I very much doubt that the answers will be any different...
Not really. I was asking a different poster, not yourself. As I did point out in the beginning of this thread I'm no mechanic and going on what someone, and other garages have told me, I'm just trying to clear up what the problem might be.
 

·
Registered
Joined
·
1,821 Posts
Not really. I was asking a different poster, not yourself. As I did point out in the beginning of this thread I'm no mechanic and going on what someone, and other garages have told me, I'm just trying to clear up what the problem might be.
Mechanic or not the answers have been provided clearly as far as I can see.I'm not going to get into a nit-pick about this, but here for your edification is the (chronological) thread of conversation you have had so far (my emphasis):

I recently bought a T4 1.9 TD X Reg. After driving it around for a couple of weeks I've noticed it feels a little under powered. According to my brother in law who's owned one before it's the Turbo vanes sticking.
No T4 is fitted with a variable vane turbo, so it won't be that.
Ok, maybe I worded it incorrectly. I'm no mechanic, just going on what I've been told. The actuator arm isn't moving at all, I was told that this is because the turbo mechanism was clogged up and sticking.
Thats a wastegate and if it was sticking you would have better performance.
Ok, so the should I be getting better or worse performance if it's sticking?
It should be stiff as it will only move at the boost cut off pressure.

Stick an airline onto the pipe and pressurise up the actuator see if it moves.

anyway the wastegate on a 1.9 is normally closed and opened with pressure - so if its stuck you shouldn't get a lack of power.
Doesn't the actuator run on vacuum? It's stuck, we tested it with a vacuum pump. Also, hasn't it got a VNT mechanism which is completely different to a waste gate?
You'll have to forgive me, but I find it very difficult to see exactly where your repeated questions were not answered.
 

·
Registered
Joined
·
225 Posts
Discussion Starter #15
Some people have far too much time on their hands.

Like I said, we did pressurise it and it didn't move.
 

·
Registered
Joined
·
280 Posts
Some people have far too much time on their hands.

Like I said, we did pressurise it and it didn't move.
Sorry mate but you stated you used a vacuum pump on it so your sucking the air out not pressuriseing it as has been suggested, I have exactly the same engine and I've had my turbo off to just clean it up whilst I blanked the EGR valve off ,I tested mine with an air line and it moved , couldnt hardly move it by hand.
these engines arent the most powerful so I did the adjustments that are well laid out on this forum , I've gained a small amount of power but I'm looking at doing a TDI conversion later on.
 

·
Registered
Joined
·
2,863 Posts
It's a 68hp indirect injected diesel engine - seriously low powered motor for such a weighty van. T:

Put a boost guage on if you don't think your turbo is working. if you're not sure how to do this, probably worth a bit of searching/googling...

What everyone has said is correct - penbryn was not trying to mock you but when an answer has been given on 3 occassions it does get frustrating...
 

·
Registered
Joined
·
225 Posts
Discussion Starter #19
It's a 68hp indirect injected diesel engine - seriously low powered motor for such a weighty van. T:

Put a boost guage on if you don't think your turbo is working. if you're not sure how to do this, probably worth a bit of searching/googling...

What everyone has said is correct - penbryn was not trying to mock you but when an answer has been given on 3 occassions it does get frustrating...
Cheers fella.
 
1 - 20 of 24 Posts
Top