AFM Alternative

Replacing the Air Flow Meter on a S14 engine with the meter from a M50 or M52. Has anybody else either heard of this or performed the switch themselves? I was told to look on www.e30.de but it is all in German and I cannot find a button to change the language.

The reason I ask is that I have experienced a sudden fall off in fuel consumption. I have ordered the two temp sensors and will check again for any leaks. Otherwise the car seems to be running fine. Just the mpg has gone from around 30 down to 15.

Any other ideas would be much appreciated.

Rob.

Thanks Uwe.

Unfortunately I have already ordered both switches. I was in a hurry due to impending track day.

Throttle switch? Due you mean the black switch at the top front of the engine? And to test it you just listen for a click when you part open the throttle and also listen for change in engine running when you disconnect it? Is that right?

Ok, so before I do anything to the AFM I need to do a bit of research on alternatives. Alpha-N, Q-chip or whatever. I am not really looking for a major power boast but more reliable economical running and maintance.

Rob.

What does AFR stand for?

Uwe, I don't think I have poor top end power. I took the car out yesterday and it seemed all right upto the red line in third gear. Well, it felt good to me but I haven't driven it for quite awhile. No miss firing or poping.

I will look up what I can on the new MAXX.

Thanks, Rob.

Hi,

sorry to be a thread robber,but just had the mot on mine and the co2's where reading low they did increase with throttle but not to the mot testers chart.

Can you give me the basic route of sensor changes first,as the AFM was fully adjusted.

Can anyone recommend a AFM reconditioner up north or is it a new part I need,I don't want to damage the engine,but fuel economy is good and its running well to me.

 regards Gaz

Hi,

The car passed the mot,car's in good condition on top and underneath,but the mot geezer is a mate of mine so he's always kean to help me keep my cars in top condition.

The car was on the tester for emissions and my mates comments where its running very weak ,the reading was 0.000 then when the throttle was opened the reading increased but he read on a chart on the wall the reading should be 1.5. He used a allen key on the metering head and told me the car was fully adjusted and the airflow meter might need tinkering with.

I drove home and couldn't resist a quick blast on the motorway and let her loose 220 klicks no problem,so its running well in my opinion and its good on the fuel so is my metering head wrong?

I seviced the car less than 1k miles ago new leads, plugs ,coil,cap,rotor filters etc but the BMW specialist on the wirral had not seen one before,so its hard to find anyone with knowledge of the e30 m around merseyside.I will travel for a good specialist and wanted a tune-up at moselys but its hard to get him on the phone.

So please point me in the direction of a good northern e30 m3 specialist or at least a k-jet metering refurb specialist.

Many thanks in advance GAZ 

Hi,

I am a fool granted,but its a leanring curve on this car for me and Kev my mechanic mate, he's a big volkswagen specialist(porsche turbo's is his thing)so I don't mind him not knowing the beemer's fuel injection system.

In reply Uwe,the car has a lamba sensor on the exhaust manifold but no cat that I could see,but the reading was low and increased with throttle.

My car is a 1989 feb 158kw model which is 215 bhp and a import from Germany in 1997. I need a good contact/specialist in the North just for a quick set up,as the basic's are all good I just want to look after it properly.

Thanks in advance Gaz 

Hi,

I am going mad,I have a lamba sensor on the manifold I think,and the rear box is a stainless dtm item,but the centre box is very large and is mostly covered by a heat shield is this a bloody cat and the lamba is before the cat?and no wiring going to the centre box(cat maybe?)

I could do with a photo of standard car underneath or one fitted with a cat as this has been confusing me since I bought the car.

I was wanting to replace the manifold and exhaust in the future as its a bit grotty and was thinking of a full stainless system.

I hope someone can solve this for me as I have never seen another e30 m3 where I am living and no one know's anything about them.

So without you chaps I'm totally lost in space.

Gaz 

Hi, Uwe,

I must have the cat,I looked at the centre section on the lift at the mot centre and no wires leading there so you would guess no cat,but your more of a expert on the m3 e30 than most,so I have taken your advise and will leave alone.

I hope this year to attend a Bmw club meet,there is usually one at Tatton hall in Cheshire around August so I can meet some more knowledgeable people and find out what my car is all about.

This site and s14.net is the only place I can get info on the car,but its running well and good on fuel in my opinion so it must be okay.

I only drive the car in good weather and only for pleasure driving so oil changes and plug swaps until I can find or meet at a show someone who can do the tappets or tune the throttle bodies for me.

I want a tune-up as just to put peace in my mind that I'm not using the car and its not set up properly,as the previous owner had very little info on the car,he had owned it for ten years but the family owned garages so not many bills came with the car.

I bought it on condition not on paperwork.

Regards Gaz