Replacement of Pierburg-LMM against Bosch-LMM on the Galaxy.

Hello everyone,

I bought a Galaxy with an AFN engine, 81kW, manufactured in 1998, with 120,000 km and a 1-year warranty from a Ford dealer. During the first inspection, I cautiously requested the replacement of the LMM (Bosch, 5-pin), which was also addressed.

Now my problem: The Ford workshop obtained the LMM from a VW workshop. Manufacturer: Pierburg (5-pin, imprint: 32130368.S1). A notch had to be cut on the new LMM so that the connector could be attached.

Since then, the car hardly runs any better. I have the impression that it now consumes about 0.3 l more, and when accelerating strongly and under full load on the highway, it also smokes.

My suspicion is that the new LMM does not fit the engine (Pierburg as a replacement for Bosch?, notch on the connector?). As it stands, the LMM is sending an excessive amount of air mass to the control unit. I don't trust the Ford people much. They didn't even find an entry for the electronic accelerator pedal (dirty potentiometer, now cleaned).

Does anyone have experience with replacing it, or can anyone help me understand this number on the LMM? Is this part correct?

Thank you in advance,
Richard

[Translating...]Die original VW- Teilenummer wäre deutlich hilfreicher. Steht da auch drauf!

Gruß

Manuel

Richard wrote:

The Ford workshop obtained the LMM from a VW workshop. Manufacturer: Pierburg. Since then, the car hardly runs better; I have the impression that it consumes about 0.3 l more, and when accelerating strongly and under full load on the highway, it also smokes. My suspicion is that the new LMM does not fit the engine (Pierburg as a replacement for Bosch?, cut-off nose on the connector?). As it stands, the LMM sends too much air mass to the control unit.

Hm, with normal (and especially with increased) air mass signal, the injection amount should normally trigger the torque limitation, so that an intact engine should not smoke noticeably (or more than normal).Unless the engine has a breathing problem (clogged intake ducts, cat particles as exhaust blockage, LLK ineffective...), so that a properly measuring LMM triggers the smoke brake.
Then a too-measuring LMM could actually cause more smoking...



Perhaps the Fordlers have also installed a throttle body leak, or a kinked AGR control hose (so that the AGR does not or closes too slowly) -> this allows you to make TDIs "puff"