2.5 TDi A4 power irregularities
My 1998 A4 Avant 2.5 TDi is the classiest thing I've ever owned (by some margin) - a truely fabulous car. I feel I can say that, as it's now done 177K and still does 51mpg on a long trip and 37.5 mpg round town!
I've noticed a tendancy now though, whilst booting it, for the power to die off quite a bit just after 3k. It has the usual complete and total lack of power under 1500 but seems to be developing a 'power hole' just after 3K. The power picks up again after this dip too. This is a bit strange really... Also - If I depress the accelerator smoothly - matching the actual acceleration it's not as bad, but if I push the accelerator right down, the accleration almost stops. There's no smoke whatsoever either. My guesses are:
a) due to the now astro mileage!
b) the MAF - it's on it's 3rd, last one installed at 140K, so 37K ago.
c) the turbo - they don't live for ever, and I reckoned on replacing it at some point...
What do people think, new MAF as a first base? Maybe just disconnect it and test it for a mile?