2015 R1200RT wethead non starter

[Duggie121]

Hi, I’m looking for some help please….2015 r1200rt wet head 11500 miles.

The problem started soon after leaving home for a ride, bike running fine until it started to splutter and lose power similar to limp mode, decided to head back home….just got home when the bike stalled, hot smell noticed and has failed to start since….
This is a list of what I’ve checked/replaced so far…
New battery and spark plugs, spark test carried out all ok
Connected to gs-911 no faults shown.
Syphoned out fuel and replaced with new
Checked valve timing and gaps, all within spec.
Compression test 162 psi on both cylinders so that’s ok.
Removed injector and cranked over… fuel spray from injector
Replaced camshaft position sensor just in case gs-911 not registering fault..
Called out RAC…. patrol guy who was totally at a loss as to why bike not firing up.
Sprayed easy start into air intake…slight splutter fire up but refusing to start.
I’m now planning on removing the tank and replacing the fuel controller and pump even though no faults showing and fuel at injectors.

Any advice or ideas.. gratefully received

 

[Santa-2512]

Suck , squeeze, bang , blow

What does the kombi (dash ) show at igntion start up / cycle

does it have an alarm?

does it turn over when the start button pressed, or nothing

Do you have EWS displayed on the Kombi at all??

have you tried using the spare key (if its a physical key) or the key under the rear mudguard incase its out of sync with the bike (keyless)

changed the battery in the keyless fob ??

 

[Duggie121]

Hi,
I’ll have to check the dash in the morning, I’m sure that was all normal, certainly no EWS displayed..
The bike does have an alarm which I think is disabled.
I could try the emergency key, think I've tried most other things !
I’ll also do the keyless battery but seeing all this happened whilst on the move not sure that would be the issue.
Thanks for your reply

 

[MotoRevive]

Have you tried checking for spark ? Ground the plug on the motor or on a Jump lead to earth.

If the motor is cranking and spraying from the injectors , you should be able to ignore EWS, fob batteries etc.

I'm guessing you have a none-spark. The splutter from easy start is probably compression detonation.

I'm very surprised you have nothing at all on diagnostics though.

 

[Duggie121]

Yes, tested the plugs for a spark.
The only thing that I haven’t done is checking the fuel pump pressure, I’m getting fuel to the injectors but not tested the pressure

 

[MotoRevive]

To get a spray mist from an injector it needs to be under pressure. And even if the pressure wasn't ideal, it would do more than splutter.

And it would run with brake cleaner in the air intakes if you were continuous with it.

Did the injectors spray continuously?

And was the spark continuous?

Does it crank over quickly ?

Quick enough that it would start. Although it sounds like it was failing as it was running.

 

[MotoRevive]

When I was in the dealer network, we had a bike which was exactly like this. Many years ago now.

It had everyone stumped. No faults. We fired the parts cannon at it hard. Even a new loom, throttle bodies, ECU... We had technical come out from BMW and he was stumped too.

In the end, it turned out to be none genuine Aux lights. And we still can't work out why...

Point is... Have you got any accessories? Is the bike altered in any way ?

 

[Duggie121]

The only extras are a optimate usb charger which is wired directly to the battery and a after market horn, other than that the bike is standard

​

 

[Duggie121]

Injectors sprayed continuously and the spark was continuous, I’ll do another test on those tomorrow..
The bike cranks over fast enough to start the bike, a new battery was fitted the following day after this happened

 

[MotoRevive]

You ain't filled it full of diesel have you ?

If it's got spark, fuel and compression then it should absolutely run.

The only way it wouldnt is:

The fuel is wrong (water or diesel)

The spark isn't strong under compression (it does make a difference)

The timing is off. (I've never known that happen)

As you've tried with brake cleaner and not getting any combustion, I'm not convinced it's fuel related. Or fuel pressure.

Your exhaust flap isn't seized shut is it ?

Take the silencer off and check.

 

[Duggie121]

Definitely not diesel 100% sure about that.
I checked exhaust flap using the gs-911 that can be heard cycling properly.
I annoyingly damaged the fuel line today in an attempt to test the continuous flow from the pump so couldn’t try starting it, having to wait until Tuesday now to get a replacement
I’m edging towards it being fuel related as the only time it’s tried firing is with the use of easy start

 

[Santa-2512]

Definitely not diesel 100% sure about that.
I checked exhaust flap using the gs-911 that can be heard cycling properly.
I annoyingly damaged the fuel line today in an attempt to test the continuous flow from the pump so couldn’t try starting it, having to wait until Tuesday now to get a replacement
I’m edging towards it being fuel related as the only time it’s tried firing is with the use of easy start

Just beacause the Exhaust flap makes noises, dosent mean it isnt siezed

Only way to check is to take the back box off and have a look see,

They invairably fail in the open position , so not much is lost just slightly louder

If it has failed on closed (unlikley as the pressure of the exhaust oushes it open ) just push it to open and disconect the cables

 

[MotoRevive]

Definitely not diesel 100% sure about that.
I checked exhaust flap using the gs-911 that can be heard cycling properly.
I annoyingly damaged the fuel line today in an attempt to test the continuous flow from the pump so couldn’t try starting it, having to wait until Tuesday now to get a replacement
I’m edging towards it being fuel related as the only time it’s tried firing is with the use of easy start

Whenever I have ever used 'easy start' on a GS, even with the injectors disconnected, you can get them to rev their balls off with a continuous mist spray of brake cleaner.

If you're spraying from an aerosol , then you might not be getting that. You're probably just flooding it.

I use a Brake cleaner pump bottle. Yon can pressurise them quite high and set the nozzle to mist.

FYI, your bike does have a fuel pressure sensor.. So it should be flagging up a problem. However, is that sensor is faulty, it could be your issue. Or part of it.