BMW K1200, K1300, and K1600 Forum banner

1 - 20 of 25 Posts

·
Registered
Joined
·
13 Posts
Discussion Starter #1
Hi guys, I bought a K100RS and drove it back from the dealer over 130miles and all was fine. The next day took it out didnt get more than 2 miles and it cut out. No chance of it starting. All lights worked, engine turned but would not even try to fire. Anyway left it over night is some nice old ladies garage, next day it started. But the promptly died. So I took out the plugs to check for a spark, all was good, but they were soaked in fuel. So it seems like the injection system is just chucking out fuel? Anyone has this issue before, is it a sensor or ecu issue? How can I check?

Thanks in advance
 

·
Addict
Joined
·
3,750 Posts
All these big K's flood very easily unless you are used to them. The starting trick is NOT to open the throttle. If it doesn't fire after 3 cranks, leave it alone for 1/2 hour then try again. Once the plugs have been flooded they have to be dried out.

New to you bike, so you may have to start looking at things before being confident about doing a long ride. Has it been serviced and what was changed before you bought it? If you rode 2 miles and it cut out, that sounds like a fuel problem or electrics. Pity the dealer is so far away, I'd have had it back in their shop and insisted they did a computer diagnostics check.



Never pay again for live sex! | Hot girls doing naughty stuff for free! | Chat for free!
 

·
Registered
Joined
·
1,840 Posts
Fuel pressure regulator or stuck/defective TPS......but suspicious me, I would start looking back at anything the dealer may have worked on or....forgotten to work on! :teeth

But give some details here, year, milleage, previous symptoms, work done etc...etc....! :confused:
 

·
Registered
Joined
·
13 Posts
Discussion Starter #4
Hi guys thanks for the replies so far. Well I had the battery off last night to recharge it as I pretty much drained it when I broke down. Slapped it back on this morning, and oh-my-god. The thing nearly caugh fire on me. No idea what the hell happened. It started with me trying to fire it up but no joy, wouldnt even turn. Just sum wine and ticking from the battery area. So I though maybe I didnt make the contact good enough so I tightened it up and still no joy, but only this time smoke start coming from the battery area. It kept coming even after the ignition was off, so it was a scramble to get the thing disconnected.

I suspect when I pressed the ignition, for some reason the starter motor wouldn't turn causing the motor to draw too much current so the relay fused shut and kept the connection even with the ignition off.

After the smoke cleared it looks like no damage was done to the bike, all the heat was in the battery, so it's a new battery now and probably major electric issue due to this short. Hopefully the relay is easy to replace and the starter motor isn't totally fucked.

In terms of history, the bike had a major service 3000miles ago, with the ABS removed. No electrical work was carried out, apart from checking it was ok. I don't have the full details with me, but it included things like new fork seals, plugs, brake hose's, pads, oils and tyres.

What vex's me is I did 130 miles no worries, then the next day all Pete tong. Somone else suggested perhaps the injectors were stuck open?

Either way I gonna need a good parts place, apart from eBay where's good for cheap k100 bits?
 

·
Registered
Joined
·
1,840 Posts
Yep, relays/starter/battery Ouch....but I think you are heading the right way!

Parts:
New, and easy to use parts fiche:
http://www.maxbmwmotorcycles.com/fiche/fiche.aspx

Used:
http://www.beemerboneyard.com/
http://www.duncansbeemers.com/bikes/index.html
http://www.re-psycle.com/
http://www.cyclesrecycled.com/

And I came across this just yesterday.

http://losangeles.craigslist.org/lac/mcy/1631444617.html

But can I suggest some way to quick disconnect your battery when further testing, like Vise-grips on a terminal and.....a large fire extinguisher! :D
 

·
Addict
Joined
·
3,750 Posts
Methinks there may be TWO ground terminals on the battery. I'm only familiar with the K12 and there are 2 ground wires. Read on if you think the K100 is the same:

One is the frame ground to take mucho amps starter current, the other is the loom ground which can also try to take mucho amps when somebody has added extras and used the frame as a ground. When you lift the battery, this lead can drop behind the case so you can't see it when you replace the battery.

The bad news is, leaving the frame ground off the battery and starting gives you a slow crank (BIG WARNING, something wrong), but whilst this is happening, the loom is smoking itself to death. :boom:



Never pay again for live sex! | Hot girls doing naughty stuff for free! | Chat for free!
 

·
Registered
Joined
·
13 Posts
Discussion Starter #7 (Edited)
@H96669 - Thanks for the links
@Voxmagna - Not sure, can only see one ground, but gonna prob get the tank soon and see what about.

Well tonight I removed the starter motor cleaned it and managed to open the starter relay using a hammer!

As I fried the original battery I borrowed the battery off my Guzzi and yay the bike fired into life.

I hardly used any choke this time infact a small blip of the throttle and it fired from cold. Kept it going for a couple of mins on the throttle and then it was warm enough to idle. After about 5 min of idle it promptly cut out. This time I noticed it struggling for a minute before it cut, the exhaust smelt very rich and it got lumpier then died.

So i'm now starting to wonder if somthing happens when the engine gets to temperature, maybe the heat is affecting the injectors or some sensor? I heard this can happen but I can't find the reference on the net.

Does this sound familier now? Or am I thinking on the wrong lines.
 

·
Registered
Joined
·
1,840 Posts
jwab said:
@So i'm now starting to wonder if somthing happens when the engine gets to temperature, maybe the heat is affecting the injectors or some sensor? I heard this can happen but I can't find the reference on the net.

Does this sound familier now? Or am I thinking on the wrong lines.
Familiar yep....the O2 Sensor.And depending on years, Intake Air Temperature Sensor, Engine Temperature Sensor, those are connected to the brain to vary the Fuel/Air mixture depending on conditions.

Someone else is having symptoms like that.....But it has been a while since I worked on one of them, do they need a TPS reset after taking the battery out ? Can't hurt anyway: Ignition ON, Engine Off, Crank and release the throttle 4 times,Ignition Off, that's it, at least on my bike, may be different on yours.

But check this one here, may give you some ideas.

http://www.k-bikes.com/forums/showthread.php?t=21084

But you are right, very little on the net on that... :confused:

And.....what kind of Guzzi? :)
 

·
Registered
Joined
·
13 Posts
Discussion Starter #9
Well I've had an intersting conversation with a person from Sherlocks of devon BMW specialist and they said the 8v K100 doesn't even have a O2/Lambda sensor. They suggested that it could be the fuel pressure regulator.

Anyways I'm gonna get it off this weekend to take a gander and see what stuff it does have.

Oh and the Guzzi is a T3 :)
 

·
Registered
Joined
·
1,840 Posts
Interesting because the "Cat" was an option in Canada in the early 90's, not a popular one at that, but the MaxBMW parts fiche seems to list them on all the bikes. So no Cat, no O2 sensor. I just went through that for a different reason and had to look back at some of the original equipment lists I have here. But fill me in a bit, what year is your bike?

A T3, nice....old's cool, I should have bought that Eldorado years ago, was cheap too! :thumb:
 

·
Registered
Joined
·
13 Posts
Discussion Starter #11
It's a 1990 SE model with the ABS removed, so last of the 8v. Getting pumped up about diseminating the thing. Had it a week now without being able to ride the it:( Mind you I only got it for the motorway, as the T3 is perfect for anything else. To be honest I don't think you can get a better bike than a Guzzi. If I had the foot boards and wind shield I would have probably never got the K100.....but then again + 130mph crusing is nice :)

And yes you should have got that Eldorado!!! :spank1:
 

·
Registered
Joined
·
1,840 Posts
What's an SE? Here is a nice 92, no Cat, Top speed...over 125 MPH, Hum.... my 85 could certainly do that....well over! :teeth

 

·
Registered
Joined
·
1,840 Posts
Looks good! :thumb: :thumb: :thumb: I have the modern version of that color combo! I like them whites and blues, always a little faster it seems....but Eh! I'm from Quebec originallly. :teeth

I see a few "Fleur-de Lys" on that wrought iron gate..... :)

Better get it going soon.....! :ricky
 

·
Registered
Joined
·
13 Posts
Discussion Starter #15
Ok now I'm perplexed. After spending a good 3hours on the weekend getting at the fuel pressure regulator, I received a new one today, fitted it, pluged the airbox, and fuel tank back in and installed a new battery.

From totally flooding the engine I now get no fuel going it at all. I check the injection rail and fuel is definatley passing the injectors but for some reason they're not injecting.

I'm wondering if I may have done some damage as I was told that to check injectors it's a matter of unscrewing the two fixing bolts on the rail, swing them out then point it to the ground and turn it over to see how much fuel comes out. When I tried to pull them out the would not budge. I did a fair amout of tugging, but little movement was had apart from up and down rather than out.

Is there somthing which must be done after you replace the pressure regulator? This is really doing my head in now. :(
 

·
Registered
Joined
·
1,840 Posts
The injectors may be stuck in there....dried out seals/corrosion/dirt etc....! They should turn individually, if they do not try lubing them and turning them, they should free out.

You haven't switched the fuel lines by any chance? And...do you hear the fuel pump? :thumb:
 

·
Registered
Joined
·
13 Posts
Discussion Starter #17
Thanks for the reassurance, the rubber surrounding them has probably melted to the engine, I'll try prise them out on the weekend.

No I'm pretty sure I got the fuel lines around the correct way :)

Someone also suggested the temperature sensor may be flaky and is stuck on an open circuit so I'll test that also.

Raining now so will have to wait for the sun again, fingers crossed for the weekend.
 

·
Registered
Joined
·
13 Posts
Discussion Starter #18
Ok some more detail has been uncovered. Today I managed to remove the injector rail with the injectors, I cleaned the ports and the injectors. Connected the tank and battery and turned it over with the rail out. Very little fuel came out of the injectors, infact fuel only came out at on the first press of the starter and when I released.

As part of other advice I now removed the connector to the engine temperature sensor. Turned it over again and now I get a very strong pulse of fuel at the first press and when I release, however no fuel comes out in between no matter how long I keep the starter on.

So I shorted the temperature sensor connection and as the first time very little to no fuel came out when pressing the starter.

So do I have a dead temperature sensor along with something else? Why would fuel squirt out on the press and release but not in between?

Is there anything else I should be testing?
 

·
Registered
Joined
·
1,840 Posts
jwab said:
Ok some more detail has been uncovered. Today I managed to remove the injector rail with the injectors, I cleaned the ports and the injectors. Connected the tank and battery and turned it over with the rail out. Very little fuel came out of the injectors, infact fuel only came out at on the first press of the starter and when I released.

As part of other advice I now removed the connector to the engine temperature sensor. Turned it over again and now I get a very strong pulse of fuel at the first press and when I release, however no fuel comes out in between no matter how long I keep the starter on.

So I shorted the temperature sensor connection and as the first time very little to no fuel came out when pressing the starter.

So do I have a dead temperature sensor along with something else? Why would fuel squirt out on the press and release but not in between?

Is there anything else I should be testing?
I was just waiting to hear from you, something similar came up on another forum. So check this out, I think you will find out what you need to know pretty soon. :thumb:

http://www.advrider.com/forums/showthread.php?t=561142
 

·
Registered
Joined
·
13 Posts
Discussion Starter #20
Hmm he had a dirty fuel line. I'm pretty sure mine is clean. When I took the injectors off the rail the sockets were all clean and the fuel was to.

Currently reading the Bosch LE-Jetronic manual to learn how the thing works. Could be the temperature sensor but it's not explaning why I only get squirts at the press and release of the starter button.
 
1 - 20 of 25 Posts
Top