R1200s engine won't idle when warm?

Copper · Post by **Copper** » Wed Jan 09, 2013 5:30 pm

Hi,

When my bike is warmed up it won't idle. It runs smoothly otherwise and ticks over if I open the throttle a little.

Any ideas?

Jon

slparry · Post by **slparry** » Wed Jan 09, 2013 6:27 pm

idle actuators?

vacuum point rubber bungs missing of one or both of the intake stubs (I assume the 12's has the same as the 11's do?)

Herb · Post by **Herb** » Wed Jan 09, 2013 8:13 pm

I feel a post from Peter F coming on.

When you say it wont idle, what does it do? Stall, stumble, hunt?

HerrFlick · Post by **HerrFlick** » Wed Jan 09, 2013 11:58 pm

My 12p worth, based on being driven out of my tree with this problem during a long trip on a friend's 1200.

Heat soak of the air intake sensor or faulty sensor.

- it's mounted low on the lhs beside the gearbox.

- the 1200 has v.lean fuelling at low rpm, and when hot the engine drops dead at 1 rpm under 2000.

- the function of the AIS is to give the ecu a signal to lean the mixture as the air temp increases, so if it's heat soaked and tell the ecu that the ambient air temp is 10C hotter than true, then the mixture is leaned out, turning the thing into a #&!!.?.

We fixed this completely with a Booster Plug (which, using it's own AIS gives more accurate temperature signals to the ecu).

HTH.

Copper · Post by **Copper** » Thu Jan 10, 2013 8:11 am

Hi,

Thanks the engine stalls when warm at idle.

Sounds like it could be any number of things, is there not any tick over adjustment, and whats a booster plug?

Jon

David_S_Walker · Post by **David_S_Walker** » Thu Jan 10, 2013 8:29 am

Hello,

Early signs of a TPS failure perhaps?

I went through this with mine...

Firstly inability to idle when warm which led to misfire at higher speeds finally leading to inability to increase revs at all whcih would clear after a while until it failed completely!

New TPS sorted it. Apparently often confused with coil packs breaking down?

Fortunately it was under a used bike warranty as they ain't cheap (Circa £180 I recall) and after plugging into the BMW Diagnostic computer this is what it threw up so they changed it and all was well.

Hope that helps?

Best regards,

David

Copper · Post by **Copper** » Thu Jan 10, 2013 9:17 am

Hi,

Fortunately my bike is still under warranty so I have emailed the dealer and will await their response. I was looking at it the other day and I'm sure the left hand throttle body is brand new I wonder if they tried to sort the problem or not set the bike up properly after changing it.

Jon

David_S_Walker · Post by **David_S_Walker** » Thu Jan 10, 2013 9:52 am

Copper wrote:Hi,

Fortunately my bike is still under warranty so I have emailed the dealer and will await their response. I was looking at it the other day and I'm sure the left hand throttle body is brand new I wonder if they tried to sort the problem or not set the bike up properly after changing it.

Jon

Hopefully they are within easy reach as I believe (and I am happy to be correected) that to diagnose it will need plugging in to their diagnostic computer.

With mine in the end it could not be ridden so was recovered and duly fixed.

It took about a couple of weeks from the first sign of the poor idling to final failure if I remember.

I had tried to fix myself with a change of plugs to no avail.

Keep us posted on progress

Best regards,

David

Copper · Post by **Copper** » Thu Jan 10, 2013 10:48 am

Hi,

Just got a reply from the dealer they are in (Lancashire and I am in Bristol) they have told me to take it to a local dealer and they will pay the bill! Great that means a trip to Dick Lovett BMW I love going there, they treat you like a king!

Jon

peter f · Post by **peter f** » Mon Jan 14, 2013 2:35 pm

Herb wrote:I feel a post from Peter F coming on.

here it is:

Other than the IAT sensor ... a small possibility is that the primary temperature sensor (the oil temp sensor located near by the alternator on the top right engine case side) could be faulty as well.

timbox2 · Post by **timbox2** » Mon Jan 14, 2013 5:48 pm

Copper wrote:Hi,

Just got a reply from the dealer they are in (Lancashire and I am in Bristol) they have told me to take it to a local dealer and they will pay the bill! Great that means a trip to Dick Lovett BMW I love going there, they treat you like a king!

Jon

I'll second that about Dick Lovett, I too didnt buy my bike from them, but they have consistantly gone out of there way to help me out.

peter f · Post by **peter f** » Tue Jan 15, 2013 1:43 pm

peter f wrote:
Herb wrote:I feel a post from Peter F coming on.

here it is:

Other than the IAT sensor ... a small possibility is that the primary temperature sensor (the oil temp sensor located near by the alternator on the top right engine case side) could be faulty as well.

BTW: my permanent warm idle problems were due: (a) faulty TPS (b) faulty right L-sensor (c) faulty oil temperature sensor (d) shortage of ouzo and cigars.

Copper · Post by **Copper** » Sun Feb 03, 2013 10:39 am

Hi,

Well typically the problem stopped as soon as the bike was booked in for a check up!

Missed the first appointment due to snow.

Went there on thursday and was lent a brand new F800 for the day.

They have checked the bike over but could find nothing wrong. They suggested I could have the throttles balanced just in case which I agreed to.

So I had the F800 overnight and collected the bike on Friday. The engineer said that one of the throttle cables wasn't seated properly as it was the throttles were balanced but with it fitted properly they were out.

All fixed now and they only charged £40 the bike runs like a dream!

Jon

peter f · Post by **peter f** » Tue Feb 05, 2013 8:14 am

Copper wrote: The engineer said that one of the throttle cables wasn't seated properly as it was the throttles were balanced but with it fitted properly they were out.

Good news ... although I barely can imagine how a cable issue (say in the splitter or elsewhere) could being affected by engine temperature. I mean that a "misalignment" (cable thermal expansion is almost non measurable) should stay the same regardless of engine thermal condition. Other than that not all sensors can be inquired by GT-1 (the so called MoBiTeck : the Siemens sourced diagnostic thing) especially the TPS.

Anyway in case that the issue reappears send me a pm.

best, Peter

Copper · Post by **Copper** » Sun Apr 07, 2013 8:38 am

Bikes done it once since,

I wonder if its a combination of cold, and using lower octane fuel, the garage on the way to and from work dosen't sell premium grade unleaded.

Jon