perksy
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| posted on 2/10/12 at 07:15 PM |
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VW TDI Van Engine Problem
Neighbour has a problem with his VW tdi van
2001 model year
T4 Version
88 Bhp
Mileage is approx 190.000 miles
Starts and idles fine but He's saying it lacks any real punch and its almost as though there's no boost
I've read the codes and there's none present or pending
I've also recorded the live data and i'll have a look and see if there's anything obvious
I'm no Diesel expert so where to start ?
Was thinking of checking all hoses to start with....
ANY advice appreciated
Thanks
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imp paul
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| posted on 2/10/12 at 07:28 PM |
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is the waste gate stuck open ? has it blown a boost hose off?  is the impeller shaft stuck eg turbo is f***** ? check for boost pull pipe off of the
blower
[Edited on 2/10/12 by imp paul]
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AntonUK
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| posted on 2/10/12 at 07:29 PM |
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Diesel Pump Timing?
Build Photos Here
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daniel mason
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| posted on 2/10/12 at 07:34 PM |
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is it a 1.9 or 2.5 5 cylinder? we have 4 of them at work
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BigFaceDave
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| posted on 2/10/12 at 07:34 PM |
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Silly question but does the van get a good run often? I got mine from a guy I work with and before I got it all it ever did was about 1 1/2 miles in
the morning and the same in the afternoon and it coked up the cat quite badly and had the same effect but at that point it was about 7 or 8 years old
and had only done 38k! Once he 'decatted' it it was much better. The first week I got it I put injector treatment in and did 350 miles on
the motorway at high revs and it smoked like mad but it made a massive difference!
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pmc_3
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| posted on 2/10/12 at 07:45 PM |
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Check none of the boost pipes are perished
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austin man
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| posted on 2/10/12 at 08:33 PM |
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Holed intercooler can you hear a hissing. Other problem is that its a T4 not a T5 lol does it show Im a T5 owner
Life is like a bowl of fruit, funny how all the weird looking ones are left alone
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Mark Allanson
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| posted on 2/10/12 at 08:46 PM |
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I'll second a leaking intercooler pipe or the intercooler itself, anything else with ping up a code
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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JoelP
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| posted on 2/10/12 at 09:16 PM |
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my vivaro lost all mid range poke, turned out to be air flow meter, which apparently doesnt give a code.
[Edited on 2/10/12 by JoelP]
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hillbillyracer
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| posted on 2/10/12 at 09:21 PM |
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If it's an 88bhp then it's a 5cyl TDI, the above suggestions are all good to look at, but I'd look at the airflow meter on the
intake pipe between the air filter & turbo. If it plays up but stays within the limits of operating range it'll probably lack power but not
give a fault code, if you unplug it then the ECU will calculate the approximate value & be closer to right than the faulty sensor was so
it'll run better disconnected if the sensor was faulty. This seems to be common on many modern diesels.
Also if the intake pipe between sensor & turbo had a leak (need to be a decent size hole to make a difference much above tickover) then the engine
will get air that the airflow meter hasn't seen & it'll have a similar effect as a faulty sensor.
ETA, JoelP beat me to it!
[Edited on 2/10/12 by hillbillyracer]
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JAMSTER
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| posted on 3/10/12 at 08:21 AM |
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chq all of the small vac pipes
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perksy
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| posted on 3/10/12 at 03:42 PM |
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Thanks everyone for your input
I'll have a poke around and try some of the ideas mentioned
Thanks again
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Rip Van Winkle
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| posted on 6/10/12 at 12:17 AM |
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I'm sure I've heard of the wastegates on these sticking?.... Drop off the actuator off and give the operator arm a wiggle.
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