12-15-2017, 10:13 AM
(12-14-2017, 10:01 AM)max_imp Wrote: Riko, thanks again for your help, having looked at all the clues we have up to this point my suspicion is that we are looking at a tps fault that creeps in over time in a small batch of bikes.
It explains why it takes some time before the fault appears and slowly gets worse.
It explains why it sometimes initiates after driving in a hot situation.
It explains why a wot reset works but only very briefly.
It explains why the kill switch reset works but only briefly.
The bad spot is still there and wears out more over time.
It may be that honda has difficulty finding the fault because their sensors give very little problems due to good engineering ( speculation ) and are not familiar with the problem.
The next problem is the diagnosis itself, even a technician with an oscilloscope would have difficulty finding the bad spot on the sensor, let alone a digital multimeter for this purpose, and because the sensor still reads mostly ok there is no fault code, the ecu does not look for a spotty reading, it only registers very low or high ( wiper broken ) voltage before it sets a code.
So the replacement of the tps or the body and do an a-b comparison is the best test i can come up with so far.
cheers max
Slowly gets worse...does it? Mine started on a warm day last July. First high idle for a few weeks (off and on), then low (off and on), then back to high, back to low, then both go away for a few rides, then back again. A few members report that their issues simply went away. What? How is that possible? Not saying I don't believe them, but that's strange.
What kind of mechanical problems simply "go away"? If a high/low idle issue really goes away, then was there any part that was truly faulty? Or, is it possible there was dirt / bad contact / crimped wire that with vibration or whatever, "corrected itself" and therefore the idle issue "went away"?
Please look at [url=http://cb1100forum.com/forum/showthread.php?tid=10073&pid=187614#pid187614]JDVALERO's post #34
And [url=http://cb1100forum.com/forum/showthread.php?tid=10073&pid=187944#pid187944]JDVALERO's post #52
This is one of the few cases that I recall reading where someone actually found something tangibly "wrong", fixed it, and had a positive change--apparently a twisted prong at the TPS connector. He says that after "fixing that the problem went away".
I checked my TPS connector. I didn't see any twisted prong, but I did clean with CRC electronic cleaner and a shot of air to both male/female ends, and then added a small amount of dialectical grease to contact points. 5 rides since and I've had two, brief instances of low idle at 900rpm, both occuring after an a good hour of riding...but nothing like before and upon turn off and restart idle immediately was fine at 1000. No high idle. BUT...the ambient temps are a lot cooler of late, 38-53 degrees instead of 55-75 during October and November.
It's at least something that others can try to see there's any improvement. I may not be able to confirm till warmer days come in about 4-5 months. I do ride throughout the winter and if the problem returns, I'll sqwak about it.