1 (Solved) K1 (16V) not starting Fri Nov 18, 2016 8:25 am
Ringfad
Life time member
K1 not starting.
Symptom after a very successful run I arrived at destination and parked bike. I needed to move it 5 mins later and it would not start.
As away from home initial troubleshooting was limited but did eliminate side stand switch and fuses.
At this stage fuel pump was not working.
Bike was then trailered home.
As I am fortunate to have a few spares I replaced the complete tank (from my K1100RS).
No change. I then tried a spare Motronic and success she started. Went back to old Motronic and again she started. Re-fitted original tank and again she started. Put everything back together and left bike for a few weeks.
Next time I went to start her I had no luck but fuel pump was activating.
What I have done so far.
1. She turns over perfectly so not the battery.
2. Fuel pump now activates when ignition switched on.
3. Motronic has been replaced with known good one.
4. I have checked the air and temp sensors and they meter out correctly from Motronic connector.
5. TPS also checked and set and it also meters out correctly
6. Have again replaced fuel tank with known good pump and filter and new fuel.
7. Cleaned and checked spark plugs and they all spark (outside the engine)
8. Removed injector rail and injectors are all working *
9. Tested Hall effect sensors (thanks CF for the guide) and they are both good.
10. Fuel pipes are on correctly
11. Side stand switch works correctly i.e. when sidestand down fuel pump does not activate.
12. All fuel injection rubbers were replaced last year and injectors serviced.
13. Bike completed a 3500 km run to Germany in May without any issue.
14. Starter motor cleaned and new brushes fitted.
15. Earth cables cleaned at Starter motor, under coils and under tank (frame).
I am now thinking the fuel pressure regulator may be the problem and have ordered a pressure meter to test.
* The injectors are pulsing fuel but unsure if enough is being delivered.
Any ideas welcome so I can get this K1 back running.
Symptom after a very successful run I arrived at destination and parked bike. I needed to move it 5 mins later and it would not start.
As away from home initial troubleshooting was limited but did eliminate side stand switch and fuses.
At this stage fuel pump was not working.
Bike was then trailered home.
As I am fortunate to have a few spares I replaced the complete tank (from my K1100RS).
No change. I then tried a spare Motronic and success she started. Went back to old Motronic and again she started. Re-fitted original tank and again she started. Put everything back together and left bike for a few weeks.
Next time I went to start her I had no luck but fuel pump was activating.
What I have done so far.
1. She turns over perfectly so not the battery.
2. Fuel pump now activates when ignition switched on.
3. Motronic has been replaced with known good one.
4. I have checked the air and temp sensors and they meter out correctly from Motronic connector.
5. TPS also checked and set and it also meters out correctly
6. Have again replaced fuel tank with known good pump and filter and new fuel.
7. Cleaned and checked spark plugs and they all spark (outside the engine)
8. Removed injector rail and injectors are all working *
9. Tested Hall effect sensors (thanks CF for the guide) and they are both good.
10. Fuel pipes are on correctly
11. Side stand switch works correctly i.e. when sidestand down fuel pump does not activate.
12. All fuel injection rubbers were replaced last year and injectors serviced.
13. Bike completed a 3500 km run to Germany in May without any issue.
14. Starter motor cleaned and new brushes fitted.
15. Earth cables cleaned at Starter motor, under coils and under tank (frame).
I am now thinking the fuel pressure regulator may be the problem and have ordered a pressure meter to test.
* The injectors are pulsing fuel but unsure if enough is being delivered.
Any ideas welcome so I can get this K1 back running.
Last edited by Ringfad on Mon Apr 03, 2017 5:32 pm; edited 2 times in total
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K1 Black 1993 60K Km K1100RS Black 1996 K1 Blue 1990 25K Miles
K1200RS Red