03-17-2018, 06:10 AM
Flynrider thanks for posting your findings, i hope with the weather getting warmer more will let us know their experience with this enigma.
With every post we get to know more about the circumstances when they occur, i got lost in all the posts and spent some time cherry picking posts and accumulating all relevant info in one word document and make it easy to combine the content.
To date we have four confirmed successful events apart from a number of other repairs that also worked well.
The two suspects are the tps and iacv, i think we eliminated all the easy to get to parts and are down to replacing the iacv in Dave's bike, it is a bit of a task and Dave was very helpful in the diagnosis.
We may now learn more about what it is that causes this idle thing, something that remains hidden when a dealer performs the repair, but Dave has an opportunity to clear up the fog that surrounds this repair.
Because i did some tests on how the iacv works and the help of popgun we know that the iacv is a busy part, it does a lot of work around the normal idle position, because the way the software inside the ecm is written every time the throttle moves the iacv is told by the ecm to move a few steps in the same place, in anticipation of the real reason why this is the case my thinking is that some of them do not stand up to this amount of work in this spot and have difficulty moving small amounts, they are quite delicate parts operating in a hot place, but when the engine is restarted the iacv does some more traveling and is able to overcome the sticking point and temporarily behave as normal, again, just my unconfirmed speculation.
With every post we get to know more about the circumstances when they occur, i got lost in all the posts and spent some time cherry picking posts and accumulating all relevant info in one word document and make it easy to combine the content.
To date we have four confirmed successful events apart from a number of other repairs that also worked well.
The two suspects are the tps and iacv, i think we eliminated all the easy to get to parts and are down to replacing the iacv in Dave's bike, it is a bit of a task and Dave was very helpful in the diagnosis.
We may now learn more about what it is that causes this idle thing, something that remains hidden when a dealer performs the repair, but Dave has an opportunity to clear up the fog that surrounds this repair.
Because i did some tests on how the iacv works and the help of popgun we know that the iacv is a busy part, it does a lot of work around the normal idle position, because the way the software inside the ecm is written every time the throttle moves the iacv is told by the ecm to move a few steps in the same place, in anticipation of the real reason why this is the case my thinking is that some of them do not stand up to this amount of work in this spot and have difficulty moving small amounts, they are quite delicate parts operating in a hot place, but when the engine is restarted the iacv does some more traveling and is able to overcome the sticking point and temporarily behave as normal, again, just my unconfirmed speculation.