12-11-2020, 02:55 AM
(12-10-2020, 04:08 PM)iamheero_imp Wrote: Hello all,
It's with a heavy heart I write this comment but I'm at my wit's end trying to tackle this solo so far! I believe my 2017 has been afflicted by this nasty IACV issue and it's a real bummer, but it's taken a long time to diagnose because of how intermittent it is. I had put about 22,000 miles on the bike before I had the valves adjusted (not that I noticed any issues, but I felt like it was overdue). While I had that done, I also got my bike professionally tuned by a local shop with a good reputation. Although it rode fine for a while after, things have gotten progressively worse and I think I'm going to have to take the bike in soon.
First, I had very intermittently had issues with high idle as I started the bike (~1800rpm) until it was warmed up, and those were solved with a kill-switch reset. I paid it no mind, really, since it happened like 3 times over the year I was riding it and solved itself generally.
Then I started noticing it would stay above ~1100 rpm even after it should have warmed up and this happened frequently.
THEN I noticed that the RPM would drop to 5-600rpm at idle, rolling up to stop signs and in traffic, and unless I rolled on the throttle immediately, it would die. It would start right up on me, but would die at the next stop sign.
At this point, I tried to remedy the issue myself. I changed the oil and filter early (usually at 5,000mi), spark plugs, cleaned the air filter, cleaned the TPS sensor and checked for kinks, reset the TPS, and while I was at it changed the brake and clutch fluids and replaced the chain and sprockets. I also tried to give it the ol' Italian tune-up, riding with very high RPMs and redlining it for a bit. I tried to seafoam the oil and gas and emptied and refilled the gas tank as well. I tried a tank of 93 instead of the usual regular I use. I would test after each of those fixes and was still having trouble, but eventually it just sorta stopped happening.
The idle at start was high, 14-1500 until warm, but after about 10 minutes of riding it would settle at around 9500 and was *fairly* stable. Less stable than I was used to before all this, and not reading where it should, but it got me around town and felt great when I was in motion. And for about 1000 miles it didn't die on me again, but the weather was getting cooler too at this point and I hear ambient temperature could affect the IACV issues.
So yesterday it was a warm LA day and I went for a ride, it died on me a few times in traffic. Same 600rpm to stall pattern as before.
So the question I have is this: does this sound like IACV troubles? Anything else I can do? Money isn't exactly flowing like water with COVID so if I could avoid giving a shop several thousand dollars to fix a highly intermittent and difficult-to-diagnose problem that'd be great.
To clarify:
1) valves were actually adjusted or just checked? Not sure if that would matter, but curious
2) was the shop that adjusted the valves the same that did the professional tuning? Sounds like it, but just to confirm
3) what did the professional tuning involve?
4) and there was no hint of high / low idle issue before valve adjustment / tuning, correct?
My '14 standard (I no longer have it) started with high idle and then low idle developed a few months afterwards. High idle: would stay at 1700-1800rpm after warming up. Low idle would happen after an hour of riding and then coming to stop, sputter at 550-600 rpm and then creep up to maybe 700. Only died twice, possibly because I knew it was coming and gave it a bit of gas. Some trips I would start with high idle and then finish with low.
All the above was intermittent. Some days I wouldn't have any issues, but most days I did. Anyway, that was the behavior of mine so that you can compare.