S50 wireing

[Siggo]

I met a guy today and he seems to think because I have no engine management light coming up on dash . The engine is not releasing it's full power.i don't know if it is wired up and bulp is not working or just don't have one. Could there be any truth in this thanks

[Brianmoooore]

Lack of the management light won't be the problem, but not being able to tell if it would be lit if fitted might be. Engine might well be in a power restricted mode.

[Siggo]

Yes that's what he's saying . How could I check this thanks

[Brianmoooore]

Get a scanner connected to it, and check for fault codes.
Do you have the road speed signal connected to the ECU, IIRC, this engine sulks if it is missing, and I don't think it throws a code.

[jmc330i]

From your other thread....

As above, first get the fault codes read (fix issues and clear codes if needs be) and get the adaptions cleared. Clearing the adaptions on mine made it a different car.

[Siggo]

As far as I know no faults but will get it in again this week.yes it's connected. Just this guy thinks this wire controls a lot to do with how the engine runs . He mention the vanous unit . The car does drive ok but thinks with this done I should see a lot of difference .

[jmc330i]

Never had an engine management light connected on my S50B30. It made just shy of 300bhp.

It's not just the fault codes that need to be read/cleared. The ECU stores adaption values (I believe for Vanos and ignition timing) which are affected by driving style - if the engine has been used conservatively in a previous life, clearing/resetting these adaption values should liven the car up - give it a good hard drive so the ecu can learn its new 'driving style'.

This made a massive difference on my S50B30, and more recently I've had the adaption values reset on my little M44. It was like driving a different car, much better throttle response, better pick up and much quicker.