Wandering idle, stalling

Thumper · 10-28-2022, 10:06 AM

My newer 2022 and 1/2 Templar X has a drifting idle speed. And has a tendency to stall. I can defeat this by raising the idle (the stalling).

My guess is an intake leak. I was initially thinking float bowl level, but that doesn't make sense for the symptoms really.

The OEM smoothbore card runs great across the throttle range. I did bump pilot and main one step. When it was warm out, it started instantly with one touch, and 1/8th. throttle. Now that it is cold, it needs a bit of choke to start. The symptoms seem worse. This makes sense if too much air is getting in... Leaky intake.

Any other ideas??

TominMO · 10-28-2022, 10:42 AM

Thinking that since colder air is denser air, it is behaving the same as an intake leak; i.e., more air than gas. That said, maybe you do have an intake leak, so you could try squirting some soapy water around the intake parts to see if you get any change, or bubbles. After that (if no change), I would try going up one main jet size to see if that compensates for the colder air.

Curious to hear Megadan's and others' opinions, as I am not a carb expert.

Pathfinders · 10-28-2022, 11:48 AM

If you suspect a intake leak you could spray a little starting fluid in the area of the leak. If the motor ramps up then you have found the leak.

Thumper · 10-28-2022, 12:30 PM

Quote:

Originally Posted by Pathfinders

If you suspect a intake leak you could spray a little starting fluid in the area of the leak. If the motor ramps up then you have found the leak.

Of course. Got some. Excellent advice. I forgot about this. Revving response to starting fluid between the carb and cylinder is an instant diagnosis

clash 168cc · 10-28-2022, 04:32 PM

Float has some trash in needle and seat maybe.

10-28-2022, 10:06 AM	#1
Thumper Join Date: Feb 2021 Location: Kansas City Posts: 2,317	Wandering idle, stalling My newer 2022 and 1/2 Templar X has a drifting idle speed. And has a tendency to stall. I can defeat this by raising the idle (the stalling). My guess is an intake leak. I was initially thinking float bowl level, but that doesn't make sense for the symptoms really. The OEM smoothbore card runs great across the throttle range. I did bump pilot and main one step. When it was warm out, it started instantly with one touch, and 1/8th. throttle. Now that it is cold, it needs a bit of choke to start. The symptoms seem worse. This makes sense if too much air is getting in... Leaky intake. Any other ideas??
	1

10-28-2022, 10:42 AM	#2
TominMO Join Date: Sep 2021 Location: De Soto, MO Posts: 1,871	Thinking that since colder air is denser air, it is behaving the same as an intake leak; i.e., more air than gas. That said, maybe you do have an intake leak, so you could try squirting some soapy water around the intake parts to see if you get any change, or bubbles. After that (if no change), I would try going up one main jet size to see if that compensates for the colder air. Curious to hear Megadan's and others' opinions, as I am not a carb expert. __________________ 2021 Lifan Xpect--sold 2022 Lifan KPX 1972 Honda CT90--The Carrot 1969 Honda CT90--The Tomahto Cheesy is the WDK (workplace drama king). Now retired. Nope, back in the saddle. Climate: The Movie https://www.youtube.com/watch?v=A24fWmNA6lM How our government really works https://www.youtube.com/watch?v=QjadCd0VRBw Question all authority.....think for yourself
	0

10-28-2022, 11:48 AM	#3
Pathfinders Join Date: Nov 2017 Location: Upstate SC Posts: 129	If you suspect a intake leak you could spray a little starting fluid in the area of the leak. If the motor ramps up then you have found the leak.
	1

10-28-2022, 04:32 PM	#5
clash 168cc Join Date: Jul 2022 Posts: 94	Float has some trash in needle and seat maybe.
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