Injector problem

Beemerman59

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Had to get the 1200GSA recovered this afternoon after the engine management warning light came on and the engine began to misfire. Didn't fancy trying to ride 60 miles like that so had the RAC get me home.

Plugged in the GS911 and the only error is no. 10151 Injector valve 2/ Injector valve 3. So, problem with fuel delivery and hopefully nothing too expensive! I don't quite know why its numbers 2 and 3 when its a two pot engine. The Hexcode people have added in brackets (on a 4 cylinder engine!) after the error message.

Anyone know what this is all about and where I should start looking? While I had the GS911 plugged in I re calibrated the stepper motors and performed the tests on the idle actuators and all seemed OK.
 
Determine what side is missing then swap the injectors round, if its one of them then it will swap sides. Get the duff one cleaned (might work might not) or replace it. If it doesn't swap sides it isn't the injector and time to look elsewhere like coils and plugs, again checking and swapping them around will tell you which one is duff.
 
I tried to tell which side it was last night but can't. On the GS911 the cylinder head temperatures are showing the same when the engine's running. I'm now thinking that the fault code is relating to both injectors not just one so I think I'm going to be hunting for something electrical that's affecting both. I do have a Wunderlich power controller fitted so the first thing to try will be to remove that and put it back to stock.
 
I see you posted to the 911 group. It's a good plan to disconnect your controller as well. This needs to be the first thing you do or you will just go round in circles trying to diagnose this if it doesn't in fact cure the problem.
Follow the O2 sensor traces as well on the 911 and you will see what is happening with the fuel. If it goes rich during the misfire then it's ignition related (fuel not igniting) if it goes lean then fuel isn't being injected, this will also tell you what side its on or if it's both.
 
Marki_GSA said:
I see you posted to the 911 group. It's a good plan to disconnect your controller as well. This needs to be the first thing you do or you will just go round in circles trying to diagnose this if it doesn't in fact cure the problem.
Follow the O2 sensor traces as well on the 911 and you will see what is happening with the fuel. If it goes rich during the misfire then it's ignition related (fuel not igniting) if it goes lean then fuel isn't being injected, this will also tell you what side its on or if it's both.
Click to expand...

Good thinking - thanks. As said, I will take the controller off first as that might be the issue anyway. What confused me last night was the fault code bringing up Injector Valves 2 and 3 which was odd for a twin cylinder bike. Having googled that code I think its a generic BMW fault code that could refer to multi cylinder engines of various configurations. Thats why I'm now thinking both are affected and to be honest I'm thinking it could well be the Wunderlich controller thats gone faulty. If I get time tonight I will remove it and see what happens.
 
You could electrically disconnect the injectors one at a time and see what the GS-911 says has been lost?
 
Throttle pot is favourite as are the main ignition coils. Pull the coil off the plug slightly and see if u can hear it cracking. If the bike has been dropped its not unusual for the spark plugs to have fractured causing a misfire
 
Looks like problem solved

The more I thought about it the more I kept thinking about the Wunderluch power controller. So off it came and I have just put the stock wiring back on. Hey presto, the bike runs and revs freely with no sign of the dash lighting up like a christmas tree. I'll hook up the GS911, run the engine a little longer and have a look around. Will add the old accelerator module that I'm now glad I didn't sell. The power controller is 15 months old - I will email Nippy to see if there's anything that can be done but frankly its a bit of an excuse to think about a Hilltop remap instead. If this turn out to be the issue then the GS911 has paid its way for the first time and its not a big fix at the end of the day.
 
I think Hilltop may have another remap customer coming soon!
 
Beemerman59 said:
Will let you know - at the moment I'm in contact with Nippy to see if there's anything that can be done ie repair/exchange etc.
Click to expand...

Just to finish this thread off - Nippy Normans kindly arranged for a replacement fuel controller from Wunderluch even though the old one was well out of warranty. The brand new unit arrived last week, is now fitted and the bike's back to its old "lively" self. Thanks Nippy!
 
Nippy Normans supply Touratech, Wunderlich, Desert Fox and many other makes of accessories.
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