m51d25 loses power

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RaitoCZ said:
I'm not talking about the engine displacement, this is same for all M51 engines: 2497cc -> 2.5l.
DDE stands for Digital Diesel Electronics by BOSCH. On M51D25 it is in version 2.1 (1991-1995) and it was updated with M51D25TU to version 2.2 to include MAF (1995-2001). The Range Rover engine is called M51D25M1 but was supplied by BMW to Range Rover in years from 1995 to 2001, thus matching the DDE to be version 2.2 (with explains why it also has MAF).
Click to expand...

MAF sensors for EGR exhaust gas induction measurement were only introduced on the P38 from 1998. But the system is DDE 2.2 that is why when selecting EDC version for a P38 diesel vehicles on Nanocom, it is always set to Late EDC. When set to early they will not run..
 
RaitoCZ said:
I'm not talking about the engine displacement, this is same for all M51 engines: 2497cc -> 2.5l.
DDE stands for Digital Diesel Electronics by BOSCH. On M51D25 it is in version 2.1 (1991-1995) and it was updated with M51D25TU to version 2.2 to include MAF (1995-2001). The Range Rover engine is called M51D25M1 but was supplied by BMW to Range Rover in years from 1995 to 2001, thus matching the DDE to be version 2.2 (with explains why it also has MAF).
Click to expand...
So I misread your post. It does not alter the fact that there are differences in the engine & ECU compared to the BMW set up. the M51 in the P38 come without EGR for the early ones and with EGR for the later ones.
 
Datatek said:
So I misread your post. It does not alter the fact that there are differences in the engine & ECU compared to the BMW set up. the M51 in the P38 come without EGR for the early ones and with EGR for the later ones.
Click to expand...

Different ECU mapping, different injection pump. ;)
 
Same principles.

At that mileage I'd reckon his FIP may well be on its way out so let's see what he comes back with. Chains probably stretched too. Cannot remember if he'd said he'd replaced the chains and sprockets though.
 
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