Mark wrote:
> Hi all, I've not posted here before but am after some advice, our car
> is a 2000 A3 1.9TDI s****t 110 with 118000 miles and it's due a
> service, which i'll be doing myself.
>
> In the 10 months that we've had the car I think it's become a little
> smokier under accelleration and the fuel economy doesn't seem to be
> quite as good as it used to be, i'm sure we used to easily get 500+
> miles from a tank (mostly commuter miles in traffic) whereas now we
> seem to get around 400 miles. A month or so ago I ran a bottle of
> injector cleaner through the fuel which might have improved the soot
> issue a bit but I might have imagined that. I did wonder whether my
> driving style of keeping the revs very low and just using the torque
> could allow soot to build up in the exhaust, which then gets blown out
> when I do occasionally accellerate more enthusiastically?
>
> The question is are there any service parts/procedures which can
> affect the economy? I was intending to change oil and filters, but are
> there any sensors i should be checking etc? I'm well used to working
> on petrol cars but this is the first diesel we've had.
>
> Thanks for any advice!
Take a look at TDIClub.com for good advice.
Like Dave said, the EGR/Turbo could be a little sooted- also the
intercooler could be clogged. Cleaning procedures are on TDIClub.com.
Cleaning the turbo is quite involved though- but you could just work the
VNT actuator back and forth a few times from under the car and see if
that frees it.
It's probably worth doing an italian tune-up as well- get the engine
warm and then drive it *hard* in 2nd/third. You might want to check that
cambelt first!
I'd would say MAF as a possibility for the smoke/economy issue, but when
my MAF failed on the 99 A3 110 s****t I had, it was as ceonomical as
ever, just slower. A quick test is to unplug the MAF and see how
performance is then: it should be much worse. For a proper diagnosis,
you need to log output with VAG-COM.
|
