Firstly apologies if this is in the wrong section, I posted on here a few years ago regarding my 96 p38 4.6, having bought the car 10 years ago and doing only 1 mile in it after which for most of the time it has sat locked away in my garage, I decided to remove the v8 which was an unknown quantity and I have converted it to diesel bmw 2.5 M51. I purchased the engine complete with all ancillaries and loom, bell housing, coolant and oil cooler radiators, 2.5 torque converter,
I had to change my HP24 auto box front end for a HP22 front end which has a shorter stator and turbine shaft to accommodate the 2.5 converter and also change the transmission controller ecu under the passenger seat
I had to change the transmission cooler pipes to 2.5 cut them and fit hard line connectors so that I can re route the transmission cooler and still keep my fog lights.
air con was a case of swapping pipes for the 2.5 version and re routing the compressor clutch wire
rather than having to mess about with trying to sync and match emu's I bought a matched set, BECM, ECM, instruments, drivers door lock glove box lock, 2 keys/fobs then just a case of swapping them over.
the engine came complete with its wiring loom but I had to change the under bonnet fuse box , the diesel loom comes with a round black plug and I had to splice in the corresponding socket the loom beneath the coolant header tank tracing each with with the help of workshop manual wiring diagrams,
I had to replace the pedal box with a diesel pedal box as it has the throttle pedal sensor a lot of work for the difference of a 5cm hole and two captive nuts
coolant plumbing is a straight swap for diesel coolant pipes
I have used the petrol feed and return pipes which are original and factory clipped to the chassis and joined to them with the diesel feed and return plastic pipes across the bulkhead the joins being next to the brake fluid reservoir, I replaced the petrol in tank pups for the diesel type and replaced the fuel filler pipe to accommodate the diesel filler pump nozzles.
stainless steel exhaust but I had to shorten the middle box forward pipe and reeled the flange in place and then cut off and fabricate a two bolt flange onto the 2.5 down pipe
car is back together now starts first time and sounds really well but I have a couple of issues which I would appreciate any input on,
firstly I have an issue with the under bonnet SRS fuse which keeps blowing fuse 23, but having disconnected the feed wire from the fuse box C173 pin 4 to the drivers side heated screen and leaving it unplugged fuse 23 remains intact, looking at the wiring diagram fuse 23 supplies only SRS and instrument cluster, I am thinking perhaps a fuse box internal short and will be checking for any continuity between pin 4 and fuse 23 I have already tried another relay as a process of elimination
my other issue is central locking, the car locks and unlocks using the drivers door lock with no issues, but not with the fob, I have tried the resync with key in door lock at per the handbook and also tried it in the ignition to no avail,
I have looked at BECM with Nanocom and cleared RF Memory I then went through resync procedurerescanned and have the following message:THE BECM HAS RECEIVED A VALID RADIO CODE
when I look at one of the BECM settings pages I see IMMOBILISATION CODE and a box with 4 numbers, below that EKA and a box with4 dashes and no numbers, below that FOB CODE and 3 boxes each with 3 dashes each but no numbers,
is it that the fob codes are not written ti the BECM and therefor not working, if so where can I get the fob codes, as stated above I purchased the BECM etc at a matched set.
Best regards
Steve
