engine stumble
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Joined: Feb 2006
Posts: 57
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engine stumble
I have the 25 degree injector replacement, but still get an occasional stumble / engine 1/2 second cut out when starting off when cold. It provides a real thrill at 2-3 MPH when in the process of making a turn and leaning at the same time your engine cuts off.
Anyone else have a similar problem?
Anyone else have a similar problem?
Outstanding HDF Member
Joined: Oct 2006
Posts: 2,340
Likes: 2
From: Omaha Nebraska
RE: engine stumble
I have a slight stumble right off idle, very slight and only when I pop it quick. Mine started after I put in my PCIII and had it dynoed, I need to get it back to my tuner and see if he can get rid of it.
Cruiser
Joined: Mar 2006
Posts: 204
Likes: 0
From: Scottsdale, AZ
RE: engine stumble
Mine did the same thing. I have reduced the events by 80% after going into the map and leaning 2, 5 and 10% throttle at 1250 to 1750rpm. As I recall, I leaned them out by about 8 points.
My idea was at what throttle position and rpm does it stumble. Then, either lean or richen that area and both sides of that area. I chose to lean it as I felt the stumble was from a rich conditon. As far as how much to go, I like steps of 8.
My idea was at what throttle position and rpm does it stumble. Then, either lean or richen that area and both sides of that area. I chose to lean it as I felt the stumble was from a rich conditon. As far as how much to go, I like steps of 8.
Tourer
Joined: Aug 2006
Posts: 480
Likes: 1
RE: engine stumble
I do also, If I let the bike warm up for 5 min or so I don't have a problem. I did by a Revteck fuel module but I have not installed yet, I hope it corrects the lean problem.
ORIGINAL: 2106HD
I have the 25 degree injector replacement, but still get an occasional stumble / engine 1/2 second cut out when starting off when cold. It provides a real thrill at 2-3 MPH when in the process of making a turn and leaning at the same time your engine cuts off.
Anyone else have a similar problem?
I have the 25 degree injector replacement, but still get an occasional stumble / engine 1/2 second cut out when starting off when cold. It provides a real thrill at 2-3 MPH when in the process of making a turn and leaning at the same time your engine cuts off.
Anyone else have a similar problem?
Elite HDF Member
Joined: Feb 2006
Posts: 3,515
Likes: 6
From:
RE: engine stumble
It only does it when cold, well since you should let any harley warm up before riding. Just do what you should do and let it warm up. People are in just to dang of a big hurry these days. On my carb bikes you cranked it ,fethered it till it would idle on its own then let it warm up for 5-10 minutes then and only then you could ride off.
Cruiser
Joined: Jun 2006
Posts: 128
Likes: 0
RE: engine stumble
Ditto: I have had the same issue ever since I added the PCIII. Throttle position is at zero and I have changed settings richer and leaner with no help. The bike stumbles so bad from a dead stop it almost dies.
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
RE: engine stumble
ORIGINAL: notarheli
Mine did the same thing. I have reduced the events by 80% after going into the map and leaning 2, 5 and 10% throttle at 1250 to 1750rpm. As I recall, I leaned them out by about 8 points.
My idea was at what throttle position and rpm does it stumble. Then, either lean or richen that area and both sides of that area. I chose to lean it as I felt the stumble was from a rich conditon. As far as how much to go, I like steps of 8.
Mine did the same thing. I have reduced the events by 80% after going into the map and leaning 2, 5 and 10% throttle at 1250 to 1750rpm. As I recall, I leaned them out by about 8 points.
My idea was at what throttle position and rpm does it stumble. Then, either lean or richen that area and both sides of that area. I chose to lean it as I felt the stumble was from a rich conditon. As far as how much to go, I like steps of 8.
[IMG]local://upfiles/4327/FBC488315B334474B3DA555EE36A3284.jpg[/IMG]
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Cruiser
Joined: Mar 2006
Posts: 204
Likes: 0
From: Scottsdale, AZ
RE: engine stumble
Hmmmmmmm, iclick. Looks like we did about the same thing and solved the issue about the same. But, I also notice that your ride is black cherry. So is mine. Probably only the black cherry rides can be fixed using this method. [sm=joke.gif]
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Road Warrior
Joined: Mar 2006
Posts: 1,807
Likes: 1
From: North Jersey
RE: engine stumble
My change to 25 degree injectors pretty much eliminated the cough and stall I used to get. Every so often though, I'll get a bit of a hiccup. Usually if the bike is notcompetely warmed up. I don't know if it ever could be completely eliminated. Just the nature of the V-Twin beast.