Running Rich
Thread Starter
|
6th Gear
Joined: May 2012
Posts: 11
Likes: 0
From: Joshua, Texas
Running Rich
I have a 93 Fatboy that was previously put out to pasture. Its owner was a good buddy of mine who passed last April and left this Fatboy to me.
I have been working on it off an on since last May. I put rings in it (30 over), had the heads and valves worked, rebuilt the carb, cleaned and coated the inside of the gas tanks, new started switch, new coils (it has two single fire Dyna 5 ohm coils with a Dyna S ignition), new plugs, and other cosmetic stuff.
Anyway, when I got the engine back together it ran rich. I checked for intake leaks and have re-jetted the carb six ways from Sunday and it still is running rich. It runs best with the jets that were in it when I got it (48 & 190). I have tried 45 and 46 with no luck (doesn’t run good). It is loud and I’m starting to wonder if the problem may be the exhaust being too open. No matter what way I jet the carb the idle screw doesn’t have much affect when moved. I am to the end of any think I can think of to change and I hate to get this close to the finish line and have to take it to the shop. Looking for thoughts about what the issue might be. Thanks
I have been working on it off an on since last May. I put rings in it (30 over), had the heads and valves worked, rebuilt the carb, cleaned and coated the inside of the gas tanks, new started switch, new coils (it has two single fire Dyna 5 ohm coils with a Dyna S ignition), new plugs, and other cosmetic stuff.
Anyway, when I got the engine back together it ran rich. I checked for intake leaks and have re-jetted the carb six ways from Sunday and it still is running rich. It runs best with the jets that were in it when I got it (48 & 190). I have tried 45 and 46 with no luck (doesn’t run good). It is loud and I’m starting to wonder if the problem may be the exhaust being too open. No matter what way I jet the carb the idle screw doesn’t have much affect when moved. I am to the end of any think I can think of to change and I hate to get this close to the finish line and have to take it to the shop. Looking for thoughts about what the issue might be. Thanks
Ultimate HDF Member
Joined: Jan 2009
Posts: 5,016
Likes: 277
From: East Tn Foot of The Dragon
I have a 93 Fatboy that was previously put out to pasture. Its owner was a good buddy of mine who passed last April and left this Fatboy to me.
I have been working on it off an on since last May. I put rings in it (30 over), had the heads and valves worked, rebuilt the carb, cleaned and coated the inside of the gas tanks, new started switch, new coils (it has two single fire Dyna 5 ohm coils with a Dyna S ignition), new plugs, and other cosmetic stuff.
Anyway, when I got the engine back together it ran rich. I checked for intake leaks and have re-jetted the carb six ways from Sunday and it still is running rich. It runs best with the jets that were in it when I got it (48 & 190). I have tried 45 and 46 with no luck (doesn’t run good). It is loud and I’m starting to wonder if the problem may be the exhaust being too open. No matter what way I jet the carb the idle screw doesn’t have much affect when moved. I am to the end of any think I can think of to change and I hate to get this close to the finish line and have to take it to the shop. Looking for thoughts about what the issue might be. Thanks
I have been working on it off an on since last May. I put rings in it (30 over), had the heads and valves worked, rebuilt the carb, cleaned and coated the inside of the gas tanks, new started switch, new coils (it has two single fire Dyna 5 ohm coils with a Dyna S ignition), new plugs, and other cosmetic stuff.
Anyway, when I got the engine back together it ran rich. I checked for intake leaks and have re-jetted the carb six ways from Sunday and it still is running rich. It runs best with the jets that were in it when I got it (48 & 190). I have tried 45 and 46 with no luck (doesn’t run good). It is loud and I’m starting to wonder if the problem may be the exhaust being too open. No matter what way I jet the carb the idle screw doesn’t have much affect when moved. I am to the end of any think I can think of to change and I hate to get this close to the finish line and have to take it to the shop. Looking for thoughts about what the issue might be. Thanks
Thread Starter
|
6th Gear
Joined: May 2012
Posts: 11
Likes: 0
From: Joshua, Texas
Yes, it does have some black smoke at idle, but very little. I have new coils (just bought) and while I didn't static time I did move the ignition adjustment some to see if that would help and couldn't see that it did, but timing could be the issue. Timing is set like it was when I got it. The plugs are burning black (rich). I put a kit in the carb and nothing internal looked damaged. It starts and runs great when you are accelerating, only issue is at a cruise, which made me think I needed to go one size smaller on the 48 jet to a 46, but that made it run worse. Run it too long and the plugs turn black and foul.
Outstanding HDF Member
Joined: Mar 2010
Posts: 2,965
Likes: 384
From: SoCal hi desert
I had this situation, the vacuum line from the vapor canister to the carb was left open when a po removed the canister. This made a lean condition ie vacuum leak, not rich but maybe worth checking.
Ultimate HDF Member
Joined: Jan 2009
Posts: 5,016
Likes: 277
From: East Tn Foot of The Dragon
Yes, it does have some black smoke at idle, but very little. I have new coils (just bought) and while I didn't static time I did move the ignition adjustment some to see if that would help and couldn't see that it did, but timing could be the issue. Timing is set like it was when I got it. The plugs are burning black (rich). I put a kit in the carb and nothing internal looked damaged. It starts and runs great when you are accelerating, only issue is at a cruise, which made me think I needed to go one size smaller on the 48 jet to a 46, but that made it run worse. Run it too long and the plugs turn black and foul.
Thread Starter
|
6th Gear
Joined: May 2012
Posts: 11
Likes: 0
From: Joshua, Texas
Thanks for the information so far. I took great care when I put the kit in the carb to get the float within the measurements called out in the manual so I don't believe it is float adjustment. I soaked the carb twice in carb cleaner and it didn't look very dirty when I first disassembled. It certainly acts like it has a carb issue so I may replace. Couple of things I'm a little unsure of 1) It has VOES that I don't think was wired up when I got it. There was a single wire with no connector on it that wasn't attached. The color of the wire matches what the manual shows going to the VOES so I put a connector on it and hooked it up. I checked the switch by sucking on it and it seems to work okay. 2) I adjusted the push rods per a YouTube video I found where you set at the midpoint of the lifter travel counting nut flats; I think I got it right, but since I have never done it I'm a little unsure. I think the static timing is a good thing for me to do next, but I'm a little unclear on how it is done; can a normal car timing light be used or do you need some other kind of light. Thanks again!
Thread
Thread Starter
Forum
Replies
Last Post
