51 Re: Starting Issues - Suspect Electrical Problems? Fri Mar 08, 2013 7:21 am
Cafe-K
Silver member
What sensor part # does the K1100LT use?
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The motronic ignition system is controled from within the ECU but to prevent heat issues within the ECU the final switching stage which can get hot is outside the ECU and is called the ignition amplifier and sttached to the battery cradle to get rid of the heat.twincarb wrote:Is the K1100's ignition controlled by a separate electronic ignition box as with the le Jetronic K's? As on the Jetronic systems that's what takes the signal from the hall sensor and sends it to the coils and EFI....
Also are your spark plugs the resistor ones which the K1100 manual says they should be? As non resistor one's could cause electrical surge back to the Motronic (Thats what I am lead to believe the resistors are in there for)
Cafe-K wrote:So I have an ignition amplifier on the battery box that I believe could also be the cause/weak spark? Would that be the same as the Jetronic controlled bikes? That's a good point I do have a replacement in the garage but I'm not sure how to test it (also used).
I am using an NGK DR7EA resistor type plug that is recommended as the alternative to the Bosch. I'm thinking the plugs should not be the problem.
From the symptoms yes but I have just changed my amp for much the same reasons to no avail and now have a spare amp that I think is OK but even that I am not real sure about. I have heard all sorts of strange problems blamed on faulty amps.twincarb wrote:Rick, do the symptoms add up that there could be a problem with the ignition amp? I am guessing that the motornic recieves the signal from the hall sensors and then o/p's what the ignition amp needs which would be after it's fault detection circuit...
Last edited by Cafe-K on Fri Mar 15, 2013 2:03 am; edited 1 time in total
Cafe-K wrote:I grabbed the multimeter to test my spare ignition amp and the readings showed some resistance across pins #1, 4, and 6. They definitely weren't open circuits. Would that indicate a problem with the amplifier? I also found it interesting that the resistance was the same for pins 4 & 1 and 4 & 6. I'm just not 100% sure about the logic or if this is an appropriate way to test the amp....
According to messages I'm receiving via various super foods acting on various neurotransmitters during my supper, the starter is not staying engaged and concern should be transferred to TikTok content, pet food bargains or other worthy preoccupations.Cafe-K wrote:Now I am fighting a low idle problem....like way low......500RPM so the starter is obviously staying engaged at this level which is not good. !
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