04-27-2018, 06:03 AM
(04-27-2018, 03:37 AM)Dave_imp Wrote:(04-27-2018, 01:30 AM)SportsterDoc_imp Wrote: The FSM may not so mention, but I would be tempted to spray silicone lubricant on the IACV piston before installing.
Good luck, Dave. I will be off-line tomorrow (going to Laughlin, via Kingman and Oatman) but will log-on as soon as I get home, as I am anxious to know of your progress.
Thank you Doc. I do not believe our bikes have a travel limit sensor switch, so your second option of measuring the current is probably how Honda does it. Maybe my valve got stuck at one time and this caused a higher than normal current flow that somehow disrupted the calibration (if there is a calibration) between the valve and the ECM?
I believe the FSM states to coat the valve with engine oil before installing it. What do you think about a very lite coat of grease? Would the grease potentially cause too much friction?
If it homes via current sensing, then getting stuck would give false feedback to the ECM. The ECM would think it did a full travel, instead of a partial travel, but we are just guessing, without knowing more about the actual ECM program.
The 4 wire, with two equal resistance circuits, indicate that the IACV uses two phase bi-polar windings: https://learn.adafruit.com/all-about-ste...-steppers.
(04-27-2018, 03:37 AM)Dave_imp Wrote:(04-27-2018, 01:30 AM)SportsterDoc_imp Wrote: The FSM may not so mention, but I would be tempted to spray silicone lubricant on the IACV piston before installing.
Good luck, Dave. I will be off-line tomorrow (going to Laughlin, via Kingman and Oatman) but will log-on as soon as I get home, as I am anxious to know of your progress.
Thank you Doc. I do not believe our bikes have a travel limit sensor switch, so your second option of measuring the current is probably how Honda does it. Maybe my valve got stuck at one time and this caused a higher than normal current flow that somehow disrupted the calibration (if there is a calibration) between the valve and the ECM?
I believe the FSM states to coat the valve with engine oil before installing it. What do you think about a very lite coat of grease? Would the grease potentially cause too much friction?
Grease may be too low viscosity and my thinking is that silicone spray lubricant may last longer. Do as you are most comfortable. If silicone, then check material compatibility...some is fine with plastics, rubber, etc....some are not.