Jump to content
Sign in to follow this  
rickj01

R1100RT No Spark "Please Help"

Recommended Posts

rickj01

Can any one please help me out?

I have a 1998 R1100RT that was running great. I washed the bike and than I went to start it and it started hard and died started again and looked like smoke or what I thought was steam coming off the motor. But that was it. Now I have no spark at the coil. I am sort of lost on how and what I should test next.

Oh I have the bike torn down to no gas tank and I don’t see any burned wires or any that even look like they were hot.

 

Please help

Rick

 

Share this post


Link to post
Share on other sites
Boffin

That sounds like the classic scenario for a failed Hall Effect Sensor (HES) harness. The HES is behind the lower alternator drive pulley, with the harness running up to a connector by the alternator. The harness is clamped to the block and the heat degrades the wiring, leading the insulation to crack and then either rain or a wash causes the loom to short out.

 

Beemerboneyard are a good source of replacements, or you can just replace the harness with heat resistant wire. Ebbo has a good write-up here if you want more information.

 

edit: Another common symptom is the rev-counter bouncing around with the engine stopped, although this is not always the case.

 

Andy

Edited by Boffin

Share this post


Link to post
Share on other sites
rickj01

Thanks I will give it a try and let you know.

 

Rick

Share this post


Link to post
Share on other sites
Boffin

One other thing is that the outer sheath always looks just dandy, the damage is hidden inside.

 

Andy

Share this post


Link to post
Share on other sites
AndyS

As Andy has said, the way your symptom showed itself is very typical of an HES failure. Read the article in the lower link below and see if you had any of the other tell tale symptoms:

. Difficulty starting

. Sudden Engine shutdown - as if kill switch had been operated

. No Spark

. No fuel pressure (Fuel pump not running)

. Bouncing Tacho needle

. Possible restart after a drying out period.

 

 

If you have access to some simple electronics bits (Maplin, RadioSpares/Farnell/Newark/CPC) - you could make this very simple test box: http://users.rcn.com/dehager/service/oilhead_timing_box.pdf

 

Read the article below may help you diagnose this further:

http://users.rcn.com/dehager/service/oilhead_hall_sensors.pdf

 

Andy

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

×
×
  • Create New...