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CVO Technical => Twin Cam => Topic started by: longlast on September 17, 2021, 04:57:06 AM
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I've been dealing with this intermediate low idle stalling on my 07 ultra for some time now. It doesn't always stall out but when it happens it continually wants to cut out at every stop the only way to rectify the issue is to turn off the ignition then restart the motor then it won't stall out at further stops (like in town stop n go).
Well yesterday I took a ride out to Robin Hood Harley Davidson about a 30 mi none stop run on a 60 mph road i got into town and had no stalling issues at any of the stopping points (lights n traffic) then I pulled into the Dearlerships Court yard "bang" it wanted to stall out ????
I ordered up a throttle positioning sensor perhaps replacing that it will cure the problem.
Any other thoughts are welcome, Cheers
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Does the bike have a fast idle at cold start up? If not the idle air control motor may be sticky or needs to be replaced. Also cleaning the throttle plate can help.
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Does the bike have a fast idle at cold start up? If not the idle air control motor may be sticky or needs to be replaced. Also cleaning the throttle plate can help.
Yes it has, it runs at about 1200rmp for 30 sec or so and then drops as it warms up. To 950 rpm
The throttle plat is clean since I've rerouted the CCV out from entering the throttle body. I cleaned the air temperature sensor as well.
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Clean the iac passage and valve with carb cleaner.
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X2 the IAC Had that happen to a friend of mine 2 years ago. Carb cleaner did the trick.
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Clean the iac passage and valve with carb cleaner.
:2vrolijk_21:
X2 the IAC Had that happen to a friend of mine 2 years ago. Carb cleaner did the trick.
:2vrolijk_21: I'll give that a good going over with carb cleaner
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if you have any build up around the butterfly & t body bore,this will cause that.clean that & the IAC
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I still haven't done anything with the throttle body I have been waiting for the throttle positioning sensor to arrive. (Still waiting)
I've gone through two tanks of fuel since I last posted of this issue and haven't had any stalling issues :nixweiss:
Sods law, how I've posted this next time I go out it'll want to stall every time I come to a stop.
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I believed this happened to a buddy of mine. His bike was an '07 Ultra with 72K on it. Turned out to be the IAC i believe. Let us know when you get the new one installed.
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My roadking with throttle cable would stall at stops intermittent when the speed sensor was dropping out. After replacement ran like a champ.
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STILL awaiting on part to arrive :drink: :drink:
Took the advice n cleaned out the throttle body n used carb cleaner on the air temperature sensor n the throttle positioning sensor.
The motor almost cut out a couple of times but recovered it's self. On one near stall it recovered and even went into a high rev then dropped back to normal idle.
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Finally the throttle positioning sensor arrives. Picked it up yesterday an today trying to remove the old one but having mega problems with getting the back fastener removed. :furious3: driving me nuts .
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It might be a good time to take the throttle body off, clean everything, replace the intake seals, and the sensor.
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It might be a good time to take the throttle body off, clean everything, replace the intake seals, and the sensor.
You know I had considered doing that. I've already done a throttle body seal leakage test and that was all good. Pulling the body is somewhat involved. I'll only go that route if I have too. For now I'll stick with the pain taking fiddly chore removing the back fastener.
The intake port is extremely clean since I rerouted the ccv out of the intake.
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Cleaning the IAC pintle should be regular maintenance.
The VSS is a known issue for the 2007 model year. 74402-05B is the updated (twice since your bike was new) part number.
I've replaced a dozen, all for the same complaint. "Stalls when coming to a stop, but IAC has been cleaned". Removing it only takes a couple minutes, and if it's covered with metal filings, then it's time to replace the main drive gear, too.
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Cleaning the IAC pintle should be regular maintenance.
The VSS is a known issue for the 2007 model year. 74402-05B is the updated (twice since your bike was new) part number.
I've replaced a dozen, all for the same complaint. "Stalls when coming to a stop, but IAC has been cleaned". Removing it only takes a couple minutes, and if it's covered with metal filings, then it's time to replace the main drive gear, too.
Cheers for the info :2vrolijk_21:
Got the new one in and all buttoned up. Went for a test ride did a bit of harder then norm riding no stalling from high speed to stopping but I may have solved one issue and created another.
Now it's hunting at low speed first,second gear half clutch slip and just a crack of throttle the motor hunts . With out clutch slippage there's bad heavy jurking have to give it more or no throttle it's in the 5/10 mph in first n 10/20 in second. It's fine in third gear at 20/30 mph.
Think I'll have to do some cabe adjustments to make or I need to close off the butterfly I did open the butterfly a pinch that help with the stalling . Well we'll see what happens when I put the adjustments back. ::)
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Try disconnecting the battery and let it sit overnight. It may relearn the idle after that. The new TPS may have a different value than the old one.
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Try disconnecting the battery and let it sit overnight. It may relearn the idle after that. The new TPS may have a different value than the old one.
Good thought :2vrolijk_21: I'll try it.
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:2vrolijk_21: :2vrolijk_21:
I pulled the maci fuse last night, this morning put it back in then I thought I'd check the fuel parameter on the fuel pack controller it was out 5% should have read 99% at full throttle was only 94% so I recalibrated the fuel setting and went for a test ride.
Problem solved the throttle is as smooth as silk in low gear at low speed. It was most likely a combination of the ecm and fuel pack needing calibration to the new sensor.
Didn't have any stalling issue on my ride so don't know if the fault is corrected or not time will tell and fingers crossed.
:drink: :drink: here's too all for your input.
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Cleaning the IAC pintle should be regular maintenance.
The VSS is a known issue for the 2007 model year. 74402-05B is the updated (twice since your bike was new) part number.
I've replaced a dozen, all for the same complaint. "Stalls when coming to a stop, but IAC has been cleaned". Removing it only takes a couple minutes, and if it's covered with metal filings, then it's time to replace the main drive gear, too.
Had an identical problem on my 2007 FXSTC, it kept stalling when I would approach a stop.
Replaced all kinds of sensors, cleaned this, reset that, still nothing. Kept stalling.
Replaced the VSS, problem solved.