Author Topic: No pulse signal from injector plugs?  (Read 2882 times)

Offline Gr-Racing

  • ^ Motobrick Curious
  • Posts: 73
No pulse signal from injector plugs?
« on: August 09, 2017, 04:25:00 AM »
Well here is one more lol, im trying to start my k75 with 100k miles thats been sitting for six years with no luck, i got spark/compression but no fuel i check the injector plugs with a noid light and get a small light at the firts cranck but not constant


Is their a away to check  ignition control unit?


Any tips?


I was following the trouble shooting guide but was having trouble testing the next step.
Pusing negative voltage from pin #12
  • GA
  • K75

Offline Martin

  • ^ Quintessential Motobricker
  • Posts: 4475
Re: No pulse signal from injector plugs?
« Reply #1 on: August 09, 2017, 04:58:09 AM »
Can you hear the fuel pump when you hit the start button. Check fuse number 6 Krafftstoppe. If fuse is OK check the four pin connector to the pump, it resides under the RHR side of the tank. It is a known connection problem, clean with Deoxit. Fuel pumps can also seize due to lack of use remove and check with a 12 volt power supply. If seized they can sometimes be resurrected by soaking in vinegar for a week or two. After soaking apply 12v briefly  and see if it is trying to move, alternating the polarity back and forth briefly will sometimes break it free. Applying 18v briefly can also sometimes work.
Regards Martin.
  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline Gr-Racing

  • ^ Motobrick Curious
  • Posts: 73
Re: No pulse signal from injector plugs?
« Reply #2 on: August 09, 2017, 05:06:54 AM »
New fuel pump and filter , i can hear the pump and have fuel PSI im having problems with the injectors not receiving signal
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  • K75

Offline Laitch

  • Faster than a speeding pullet
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Re: No pulse signal from injector plugs?
« Reply #3 on: August 09, 2017, 05:12:37 AM »
Is their a away to check  ignition control unit?
I was following the trouble shooting guide but was having trouble testing the next step.
Scroll further through the whole guide. There are procedures to check both the fuel injection control unit and the ignition control unit by using a multimeter.
  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline Gr-Racing

  • ^ Motobrick Curious
  • Posts: 73
Re: No pulse signal from injector plugs?
« Reply #4 on: August 09, 2017, 05:41:06 AM »
Thanks will do
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  • K75

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