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FilthyBadger

MAF & fuel temp Adaptions? (Face lift 2004 E46 330cd m-sport)

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Hello

My cars been playing up over the last few months/ years and i'm wondering if i need to clear my adaptions in INPA or DIS.

1st.) A few months ago my car was feeling really flat almost like it was driving in limb mode, when i unplugged the MAF the problems stopped and the car drove fine, i only had to put up with the engine light always on. I serviced the car yesterday and changed the MAF for a new Bosch one (like for like same part number). I drove the car yesterday and the light stayed on with the new MAF fitted and the car drove awfully. It was really flat and felt starved of air. I've read about giving the car time to learn the new sensor, surely enough after three or four short trips the engine lights gone away and the car is starting to improve. Should i clear my adaptions on INPA or DIS to speed this process up and improve the car, or just let it self adjust?

2nd.) I only read about this adaption process/ software coding yesterday and never heard of it before that. A few years ago the car was playing up, under full load in low revs picking up through the rev range on hard acceleration the car would hesitate, then kick in full power again. I've had this problem before and had the car plugged in, a fault code for the fuel temp sensor came up. so i swapped the sensor (only £15 for a new one off BMW) and it went away. Anyway after a year or two the problem came back. Surely enough same problem and bought yet another fuel temp sensor and the problem went away again. Anyway it came back again (approx a year later)! So i fitted yet another temp sensor (4th one now) and the car still played up. Note no fault codes came up after the 2nd new sensor. With the fuel temp sensor unplugged the cars fine, so I've been driving the car like this for about three years now (I've had the car 8 years and its got 197K on it). At the time i thought there may be an issue with the wiring to the sensor or electrical clip/ connection.  

I'm wondering if i need to do something in adaptions would it maybe clear this problem with my temp sensor?

All comments welcome.

Regards

Happy new year!

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Hi bud 

you can try clearing the adaptations if you have inpa do a live read on the maf and see what the values read for desired and actual values.

im having big issues with my 320d maf I have tried resetting the adaptations but no joy 😞

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Have you tried un-plugging the electronic swirl flap actuator?

Had very similar issues a few tears back and these only seem to be fitted to the 2004/2005 cars

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Hi chocka I think I did unplug it, it was a few years ago I cleaned my inlet manifold in caustic soda. I'm pretty sure I did, as I've read about this before. My cars swirl flaps are blanked off now. This issues have been with my new MAF plugged in, did the same with the old one. Unplugged the car runs pretty good just enigine light on. I've been driving the car the last few days now, it's running ok. A little slow on being responsive at low revs in 1st and 2nd. I tried the old key throttle reset trick today I believe it's made a difference. I'm going to try doing a full adaptation reset on INPA at the weekend. 

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it was unplugged it would show up as a fault but not throw a dash warning light.

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Is it an electronic EGR or vacuum? Never had the same issue or heard of the fault before, sorry. It may not be your MAF, sounds like it's an EGR issue, or there may be an issue with your MAP sensor?

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Hi dude 

my fault code is egr air mass to high but no dash lights.

what have you done too yours mate?

This sounds like the EGR is not opening - either stuck, unplugged, or the vacuum to it has failed.

Sent from my SM-G935F using Tapatalk

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