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Old 06-22-2012, 11:46 AM   #1
shalbleib OP
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Bluhduh K100 help - PLEASE and thank you

just got an 87 k100. 40k on the clock. winterized and put in a garage 6 years ago. guy said there might be an issue w. the starter but I cleaned up the pos cable(s) to the battery (terminal was completely corroded off) and replaced the battery. starter turned over but wouldn't fire. checked spark (yep), pump is pumping, bypassed fuel filter (temporarily to check it off the list), pull fuel line off rail and pump is pushing fuel, checked for clicking noise at injector plugs, and cleaned injectors w/ carb cleaner and was able to push cleaner thru when applying 12V. hooked everything back up and no fuel spitting out injectors. could it still be the injectors? trying to troubleshoot w/o just replacing and throwing money at it. any suggestions would be greatly appreciated!!
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Old 06-22-2012, 02:04 PM   #2
nwdub
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have you tried to bump start?
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Old 06-22-2012, 02:43 PM   #3
shalbleib OP
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no i figured if it wasn't getting fuel from the injectors, there wouldn't be any point right?
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Old 06-22-2012, 04:57 PM   #4
dlcool
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Question K100 help

shalbleib,

I am not sure how you determined that the plugs were sparking. Grounding the plugs to the engine like an airhead will damage your ignition system. Do not do that! There is a computer module under the seat. Make sure the cable attached to it is seated properly.

You can down load a repair manual here: http://www.flyingbrick.de/bmwrep/2Venglisch.pdf

I have a jpeg schematic of the K100 if you want it.

Dan Cool
Waynesboro, PA
1988 K75 in pieces waiting for Frame Straight
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Old 06-22-2012, 05:09 PM   #5
dlcool
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K100 help

shalbleib


Here is a link to the K100 forum http://k100rt.aforumfree.com/forum Looks like a good source for assistance.

Dan Cool
Waynesboro, PA
88 K75C in pieces waiting for Frame Straight
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Old 06-22-2012, 05:17 PM   #6
shalbleib OP
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Quote:
Originally Posted by dlcool View Post
shalbleib,

I am not sure how you determined that the plugs were sparking. Grounding the plugs to the engine like an airhead will damage your ignition system. Do not do that! There is a computer module under the seat. Make sure the cable attached to it is seated properly.

You can down load a repair manual here: http://www.flyingbrick.de/bmwrep/2Venglisch.pdf

I have a jpeg schematic of the K100 if you want it.

Dan Cool
Waynesboro, PA
1988 K75 in pieces waiting for Frame Straight
well... that's exactly what I did! how would i tell if I damaged anything? It's not acting any different (that is still turning over and not firing). thanks for the manual. I'll check it out. just trying to come up w/ a chronological process instead of jumping around chasing my tail which seems to be a mistake others have made.
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Old 06-22-2012, 05:24 PM   #7
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Two hints from a former k100 owner

The sidestand switch kills spark but not the starter

The starter clutch gums up and starter will turn but not the engine, fix is to bump start it and ride it a lot.

Sent from my SAMSUNG-SGH-I897 using Tapatalk 2
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Old 06-22-2012, 05:29 PM   #8
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Quote:
Originally Posted by CannonsvilleRider View Post
Two hints from a former k100 owner

The sidestand switch kills spark but not the starter

The starter clutch gums up and starter will turn but not the engine, fix is to bump start it and ride it a lot.

Sent from my SAMSUNG-SGH-I897 using Tapatalk 2

that would be awesome if that did the trick, but since the injectors aren't spitting, it's not going to bump over right??
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Old 06-22-2012, 05:48 PM   #9
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a) An 87 doesn't have a side stand switch, only the later 4V K100RS bikes do.

b) Is the engine turning over or the starter just spinning?

c) Six years? Send the FIs to http://www.mrinjector.us/
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Old 06-22-2012, 06:21 PM   #10
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Quote:
Originally Posted by duck View Post
a) An 87 doesn't have a side stand switch, only the later 4V K100RS bikes do.

b) Is the engine turning over or the starter just spinning?

c) Six years? Send the FIs to http://www.mrinjector.us/

starter spins but motor doesn't run over. little carb cleaner in the plug holes and it turns right over! was leaning towards new injectors or cleaning. just didn't want to do it if it didn't solve the problem - and since we did get some fuel to come out when we tried to clean them. but maybe they're still gummed up somehow and $16 a pop isn't bad.
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Old 06-22-2012, 06:31 PM   #11
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I've had numerous sets of K FIs done by him. Great service, REAL injector cleaning and very quick turnaround via Priority Mail. He even repaints them if they're looking old. I sent him a set that had been sitting since the dawn of time. Covered in rust spots and TOTALLY clogged. They came back not only functioning but looking like new.

More here: http://www.motobrick.com/index.php/topic,1064.0.html
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Old 06-22-2012, 06:32 PM   #12
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Quote:
Originally Posted by shalbleib View Post
starter spins but motor doesn't run over. little carb cleaner in the plug holes and it turns right over! was leaning towards new injectors or cleaning. just didn't want to do it if it didn't solve the problem - and since we did get some fuel to come out when we tried to clean them. but maybe they're still gummed up somehow and $16 a pop isn't bad.
Is the engine TURNING? Sounds like it is if the carb cleaner makes it run.
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Old 06-22-2012, 07:17 PM   #13
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If the engine is turning then put the plugs in and spray starting fluid into the airbox.
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Old 06-22-2012, 08:35 PM   #14
ardbeglily
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check these out

Check out the IBMWR site and the BMWMOA forums where you will find a ton of K bike info. I have a 1985 K100 and love it.
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Old 06-23-2012, 07:42 AM   #15
dlcool
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Question K100 help

shalbleib,

How much fuel pressure is being delivered by the fuel pressure regulator?

Is electrical power being delivered to the injectors?

Dan Cool
Waynesboro, PA
1988 K75C in pieces waiting for Frame Straight.
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