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Hi , I am new on this forum , and I am glad to be here.

I think that have a problem with motronic of my 320IS ,and I need one used but good. Because the newone is expencive. I need also the airbox genuine complet.
code 0261 200 087 12 12 005

ebay, my friend. what is your trouble though, before you spend some money

I don t now , realy , I am not sure. But when car is cold dont go to rpm and it s seems works on 3 cillindres. and has a bad smoke on muffler. Then when goes on temperature is OK . And sometimes in driving turns off. then I must wait unknown time and works again. dont have a spark on plugs etc...

I do have a used ECU in perfect condition for 150€ plus shipping.

BUT

Change your Coolant temperature sensor first (30€).

Check it with a tester in advance if you want: >2500Ohm when cold and 300-600 Ohm when hot.

Also change your spark plugs, cause a defective plug can effect the engine exactly as the problem you're having. Remember that plugs are specifically designed for an exact range of operating temperature.

Thanks !
Spurk plugs are new . I ll try to change first this sensor what you says.

I ll contact you than. Thanks for advice because I dont have expirience with the troubles on this car .everything was perfect till now.

BTW where you come from?

advokat wrote:BTW where you come from?

I'm from rome, italy.
The CTS (coolant temperature sensor) is the one with the blue connector, on passenger site, screwed next to the brown one (this last is the coolant temp sender for the coolant temperature gauge).

Also check: ignition wirings, 1-5 Ohm.

I dont think is an AirFlowMeter (AFM) problem cause it is temperature related, but check also this:

On the AFM male plug counting pins from the radiator, 1-2-3-4, 1-3 is the AFM output for the ECU it should be within the 5-2500 Ohm range, e.g. if it is 600 - 1500 Ohm from flap closed to wide open it's right.
To do this you have to remove the AFM from the airbox and connect a tester to the 1-3 pins. Then you need to push the rotating flap (looks like a door) of the AFM from the stop condition to the max (wide open).

An AFM refurbishing procedure is posted on the FRwilk site http://www.frwilk.com/944dme/ click on the AFM link on the right.
I have also two AFM, one is not bosch but FIC brand and one is my used bosch that i took out when i did my home made alpha-n conversion.
http://blog.libero.it/ALPHAN/?nocache=1198619589

P.S. FRWilk isn't a nice guy so don't email him if you're not going to buy something cause you will never get an answer.

Thank you soo much. Grazie infinite. Forse meglio scrivo italiano. Adesso non ho piu i dubii di risolvere il problema, Quando sono in giro gli esperti come te pronti ad aiutare. Non so, sono un po stupido per metere in pezzi air flow , farfalla. E meglio che prendo una buona e sostituire questa mia , che non va bene sono sicuro, le hanno gia aperto in un servizio BMW e mi hano detto che non funziona come dovrebe. Pero nuova costa tropo .Cosi ho deciso di cambiarla. Per centralina non sono sicuro , e farro come mi hai detto te ,cio e verrificare i sensor. Ho letto gia il tuo studio e grande lavoro che hai fatto sulla tua machina. Complimenti. Ho dubbiato sull air box anche che la macchina mi consumava un po troppo , +12 litri al 100km..

Sorry all members . For italian speeach

another problem can occur, take out the ECU and turn it upside down to see if water comes out of it!!, a friend has a water leak but it poured into his ecu and was running erratically , took it out and turned it upside down and water came out!! otherwise go thru your ignition system..... if not, then mmmmm burrn the car and claim insurance then insurance pays you your squid in the back pocket for another car and sorted!! what you reckon??

12l/100km is quite normal for a 320is/M3 car.
100cv per liter = 5-6km/l in the city and 10-11 in the speedway.

I have here an italian magazine quattroruote which reports also a consumption of 3km/l for 320is when pushing hard, that is >20l/100km.

My email is pastelletto@libero.it if you want something.
I'm sorry to say but please don't write in italian casue is very difficult for me to understand.
Nice try indeed

--ALPINA-- wrote:another problem can occur, take out the ECU and turn it upside down to see if water comes out of it!!, a friend has a water leak but it poured into his ecu and was running erratically , took it out and turned it upside down and water came out!! otherwise go thru your ignition system..... if not, then mmmmm burrn the car and claim insurance then insurance pays you your squid in the back pocket for another car and sorted!! what you reckon??

How the water can go into the ECU?!! Motronic is in cocpit , or into the car.!!

france320isco wrote:12l/100km is quite normal for a 320is/M3 car.
100cv per liter = 5-6km/l in the city and 10-11 in the speedway.

I have here an italian magazine quattroruote which reports also a consumption of 3km/l for 320is when pushing hard, that is >20l/100km.

My email is pastelletto@libero.it if you want something.
I'm sorry to say but please don't write in italian casue is very difficult for me to understand.
Nice try indeed

Yes , but the consuption must be about 10l average at 100km.
You lives in Rome but you are not italian? or I m write italian very bad that you could understand??

I prefere you to write in english cause i've had a very hard time to understand what you've written in italian (it was full of mistakes).
Nice try though!


Se preferisci parla italiano così ti alleni.

france320isco wrote:I prefere you to write in english cause i've had a very hard time to understand what you've written in italian (it was full of mistakes).
Nice try though!


Se preferisci parla italiano così ti alleni.

Ok ,scrivero in italiano cosi mi correggi!

Allora mi interersa una cosa. Cioe , ho comperato su ebay una centalina(non mi e ancora arrivata), e il venditore mi dice che e rimappata. Adesso voglio sapere da voi che avete l esperienza , se devo ancora qualcosa cambiare, tipo air flow meter o qulcosa altro. O mi andra bene senza toccare niente?
grazie