BMW K bikes (Bricks)

You are not connected. Please login or register

View previous topic View next topic Go down  Message [Page 1 of 1]


1Back to top Go down    Gasoline smell on exaust on Sun Apr 09, 2017 5:06 pm

nino


Life time member
Life time member
Hello,

I tried to reduce idle speed on k 100 8 v by central idle screw but it didnt react as expected. Then I tried with brass inlet screws. First cylinder almost no reaction, second same, third cylinder reacted instantly, fourth like first and second very slowly.
Anyone could explain why only one cylinder reacts? Finally I reduced idle with brass screw on third cylinder. All the time there is intensive gasoline smell on exaust. Could it be leaking injector? Maybe third?
FPR is almost new.

    

2Back to top Go down    Re: Gasoline smell on exaust on Sun Apr 09, 2017 5:32 pm

Crazy Frog

avatar
admin
admin
Nino,

The exhaust on my bike with the sidecar is always very rich and the exhaust always has a black deposit. Hopefully, I will start to work on it by the end of the week. (end of the winter in Canada). I will let you know what I find.


__________________________________________________
1986 k75, 1985 K100rt, 1985 K100rt/EML sidecar.
    

3Back to top Go down    Re: Gasoline smell on exaust on Sun Apr 09, 2017 5:44 pm

nino


Life time member
Life time member
Maybe temperature sensor sends signal for richer mix?

    

4Back to top Go down    Re: Gasoline smell on exaust on Sun Apr 09, 2017 5:56 pm

Crazy Frog

avatar
admin
admin
@nino wrote:Maybe temperature sensor sends signal for richer mix?
This is exactly what is my suspicion and I have a new one to be installed. This as well as the air flow meter will be my first steps for troubleshooting.
Once the sidecar is re-installed, the space to access the air box and temperature sensor is very limited and this is why both device will be replaced before having the bike on the road.
The snow is almost gone and I am anxious to be riding again.


__________________________________________________
1986 k75, 1985 K100rt, 1985 K100rt/EML sidecar.
    

5Back to top Go down    Re: Gasoline smell on exaust on Sun Apr 09, 2017 6:33 pm

nino


Life time member
Life time member
Mine MAF doesnt react on bypass screw. Engine runs even with a totaly closed vane, but performs well. Consumption is little bit higher

    

6Back to top Go down    Re: Gasoline smell on exaust on Sun Apr 09, 2017 10:25 pm

Holister

avatar
Life time member
Life time member
There are two things I would do first off Nino.
Check the SPs. If one is wet then its probably that injector leaking but I doubt there'd be enough fuel to smell it out the exhaust. If all are wet then I'd be first looking at the sensor (test pins #10 & #13 on the FICU plug) or try swapping the FICU itself with a known working unit. We've seen a few failures lately and over fueling seems to be a symptom.
Just my thoughts mate. Cheers


__________________________________________________
1988 K100RT VIN No. 0094680
1989 K100RT VIN No. 0097367 (naked)
1996 K1100RS VIN No. 0451808
Fuel: 95 Octane
Engine Oil:Nulon Full Synthetic 15W50
Gear Box Oil: Nulon Synthetic 75W90
    

7Back to top Go down    Re: Gasoline smell on exaust on Mon Apr 10, 2017 7:05 am

Crazy Frog

avatar
admin
admin
like


__________________________________________________
1986 k75, 1985 K100rt, 1985 K100rt/EML sidecar.
    

8Back to top Go down    Re: Gasoline smell on exaust on Mon Apr 10, 2017 10:28 am

nino


Life time member
Life time member
Thanks Bert and Holister. I have a plus FICU in garage but from swiss bike which was electronicaly limited to 6 th rpm. Bay the way is there a possibility of removimg FICU blocade

    

9Back to top Go down    Re: Gasoline smell on exaust on Mon Apr 10, 2017 2:42 pm

Crazy Frog

avatar
admin
admin
@nino wrote:Thanks Bert and Holister. I have a plus FICU in garage but from swiss bike which was electronicaly limited to 6 th rpm. Bay the way is there a possibility of removimg FICU blocade
I was wondering if it's the FIcu or the Icu that lock the RPM at 6K max. In my opinion, it was the ignition computer.
I started the ETK and checked both. Very Happy
For the fuel injection unit the only option is "official vehicles" when for the ignition unit, the option is "Switzerland version?"
This leads me to believe that I am right in my assumption that the rev limiter is built in the ignition unit and not the Fuel Injection.


__________________________________________________
1986 k75, 1985 K100rt, 1985 K100rt/EML sidecar.
    

10Back to top Go down    Re: Gasoline smell on exaust on Mon Apr 10, 2017 3:13 pm

nino


Life time member
Life time member
I am not shure but I think its black box in the head of the frame. I tried swiss bike K 100 and it was limited to 6500 rpm, with red mark on rev counter.
I swapped that black box and suddenly same bike went to usual limit of 8700 rpm freely. So FICU or ICU? What is it

    

11Back to top Go down    Re: Gasoline smell on exaust on Mon Apr 10, 2017 3:16 pm

Crazy Frog

avatar
admin
admin
@nino wrote:I am not sure but I think its black box in the head of the frame. I tried swiss bike K 100 and it was limited to 6500 rpm, with red mark on rev counter.
I swapped that black box and suddenly same bike went to usual limit of 8700 rpm freely. So FICU or ICU? What is it
This is the Ignition Control unit (ICU).
What you may want to swap first to solve your problem is the Fuel Injection unit(under the seat/tool box.


__________________________________________________
1986 k75, 1985 K100rt, 1985 K100rt/EML sidecar.
    

12Back to top Go down    Re: Gasoline smell on exaust on Mon Apr 10, 2017 3:20 pm

nino


Life time member
Life time member
I have one, will try. in the meantime chaged temp sensor this afternoon. Also used one but I saw some improvement. Not so much smell from exaust any more.

    

View previous topic View next topic Back to top  Message [Page 1 of 1]

Permissions in this forum:
You cannot reply to topics in this forum