Experience Report - Performance Loss at 3000 RPM on TD

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Hi,

for anyone who might be interested or who would have thought it was impossible, here's the story:

About half a year ago, I had to replace my diesel filter again. One cost around 65 DM, so I bought one from ATU, which was 35 DM cheaper there.

After installation, I tightened a few things up, and lo and behold, everything was working again. However, this was followed by the problem that it was showing a loss of power. Initially, I thought it might be due to air in the system, specifically negative pressure. Then I wondered if the injectors might have finally failed, perhaps after making a loud noise.

Okay, so let's go to ATU. The mechanic there advised me instead of replacing the nozzles, to verschandeln the engine with special fluids, which also removed a lot of dirt, and it definitely didn't cause any damage. A new diesel filter was also installed, but the performance loss remained.

Now, after 6 months of fruitless searching, Martin mentioned that after I had told him about the problem, he had also bought a diesel filter for his TD at ATU and had observed the same phenomenon.

So, ich bin zu VW gegangen und habe mir einen Dieselfilter gekauft. Ich habe den alten vom ATU entfernt und den neuen reingemacht und sofort eine Probefahrt gemacht. Ich könnte mich wirklich aufregen, dieser Dieselfilter war schuld an allem. Nach nur einer halben Jahr und 10.000 km, und nur wegen diesem Ding.

350,- DM for engine cleaning, 30,- DM each for the 2 diesel filters from ATU, and both are defective and practically useless. 600,- DM for new injectors, and this was only because I bought a slightly cheaper diesel filter. ATU returned the 2nd filter and gave me the money back, of course, the rest cannot be undone.

And the moral of the story is: the filters from ATU are not good. Therefore, it is advisable to buy from VW, to avoid problems and not to waste time.

Golf 3
Engine Code AAZ
75 PS Standard
Year of Manufacture 93
Model Year 94
TD

P.S. The diesel filter for all VW models should be the same.