[Keithlan1978]

Just after a little bit of advice, I've posted before about issues with my car smoking on idle, it's definitely fuelling related and not oil (I'm 99% certain)

I noticed the other day that my MAF sensor was on the wrong way round and has been like this since I bought the car 4 weeks ago and obviously been like that beforehand although I don't know how long for so I changed it to the correct way round yesterday (not sure this will help with smoking issue at idle but can only hope)

Anyway since I've had the car I've

blanked and removed swirl flaps

Changed main thermostat as it wasn't getting anywhere near upto temp

Changed CCV

Blanked EGR cooler off with bungs and also the blanking plate

Changed MAF sensor to the correct way round

My question is should I reset the MAF adaptions on a diagnostics machine or not and if not will the MAF just relearn and if so how many miles does it take

Also if I do reset MAF adaptions will it cause any harm to the car and will it still run ok

Thanks for any help

[335dlci]

I would reset them.

[Keithlan1978]

Originally Posted by 335dlci

I would reset them.

Will the car run ok mate or will it do anything to it if I reset them

[335dlci]

You may get injector faults.

[Keithlan1978]

Originally Posted by 335dlci

You may get injector faults.

Do you mean actually get faults with my injectors or will just show up on a diagnostics and they can be cleared? Thanks

[Keithlan1978]

Originally Posted by NasriHash

+1

Do you mean actually cause faults/damage to my injectors though or just throw codes up than can be deleted?

[Yozh]

Reset and do t worry. Can only do with bmw diagnostic software and proper cable. MAF reset always goes together with mean quantity adaptation reset. Reset both.

[Keithlan1978]

Originally Posted by Yozh

Reset and do t worry. Can only do with bmw diagnostic software and proper cable. MAF reset always goes together with mean quantity adaptation reset. Reset both.

What's mean quantity reset? I've got Delphi on my laptop which gives me the option to do maf reset will that be ok or shall I wait till I've got inpa or ista? Thanks

[Yozh]

Not many tools can reset MAF. Usually it’s icom tool you need and mainly dealers can do it. ISTA can reset mean quantity.

[Keithlan1978]

Originally Posted by Yozh

Not many tools can reset MAF. Usually it’s icom tool you need and mainly dealers can do it. ISTA can reset mean quantity.

Delphi resets the MAF adaptions mate and I've got Delphi and also I know someone who has ista

What's the mean quantity I've never heard of that?

I've left the MAF sensor unplugged for a day and a half now and the smoking has completely stopped and so has the over fuelling smell so would you say that indicates the MAF is faulty or could it be something else that the MAF is hiding?

[Yozh]

Mean quantity is an adaptation parameter that affect all of the injectors and is controlled by the DDE based on input from your MAF, O2 and injectors factors such as ageing, cleanliness etc. it adjusts slight u see or over-fueling to compensate. I would replace the MAF.

[Keithlan1978]

Originally Posted by Yozh

Mean quantity is an adaptation parameter that affect all of the injectors and is controlled by the DDE based on input from your MAF, O2 and injectors factors such as ageing, cleanliness etc. it adjusts slight u see or over-fueling to compensate. I would replace the MAF.

Ahh right I get what you mean now, thanks for explaining that, well the MAF has been unplugged since Sunday night so it's the third day now and car has been perfect with not one bit of smoke or over fuelling smell

I'm going to plug the MAF back in in about an hour and reset the adaptions on it using Delphi and run it today and see if I get any smoke, if I do then I will replace the MAF and I know someone who has ista so I will reset adaptions again on the new MAF also the mean quantity

[335stoner]

you have been driving with the maf unplugged??

[Keithlan1978]

Originally Posted by 335stoner

you have been driving with the maf unplugged??

Yeah since Sunday night mate and plugged it back in this morning

[Keithlan1978]

Right update time, so plugged the MAF back in this morning and reset the adaptions and also the mean quantity adaptions and I've run the car all day

No smoke at all which is great but the over fuelling smell is back and I know it's definitely slightly worse on fuel cos when the MAF was unplugged I was getting 31 MPG and now since the MAF has been plugged back in today it's dropped to 29.7 MPG

So would it be safe to say it's definitely the MAF or could it be hiding something else before I buy a new one? Thanks

[RS DAVE]

Speak to Thomas at Bmw Advanced Coding He's on F/B, he recoded my 335d when i converted it to 6 speed manual. no is 07783 941861...

[Keithlan1978]

Originally Posted by RS DAVE

Speak to Thomas at Bmw Advanced Coding He's on F/B, he recoded my 335d when i converted it to 6 speed manual. no is 07783 941861...

Thanks Dave where is he based

[RS DAVE]

Originally Posted by Keithlan1978

Thanks Dave where is he based

Stoke.

[Keithlan1978]

Originally Posted by RS DAVE

Stoke.

Nice one Dave I'll give him a call tomorrow, the only other thing I'm thinking is the EGR is blanked off on my car but not mapped out an I'm wondering if that's got anything to do with it and why it's only happening when the MAF is plugged in

[RS DAVE]

It needs removing from the map, get him to install a TC Performance map for you. fucking rocket ship.
Only ring after 2 pm.