EVO Engine Problem
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Intermediate
Joined: Mar 2013
Posts: 39
Likes: 0
From: Florida
EVO Engine Problem
I have a 98 Fat Boy with 21 thousand miles that for the last couple of months has been giving me grief. Almost every time I go riding the engine will quit at least once either when stopped at a light or doing highway speed. When it quits when I am stopped it will start again after cranking for a little while. When it quits while doing highway speeds it will all of a sudden start again, it seems kind of like when you run out of fuel and then turn on reserve. One other thing, the engine will backfire, sometimes very loud now and then. I have checked the coil, changed the plugs and wires, drained the fuel tank looking for garbage which I found and corrected and it is still happening. I have had it in a good shop but they haven't been able to duplicate the problem after a week so I picked it up. On my way home it happened again. The bike runs well before and after these events. I am running a EV 27 cam, stock CV Carb, Hypercharger air cleaner and Vance and Hines exhaust, any thoughts?
Thread Starter
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Intermediate
Joined: Mar 2013
Posts: 39
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From: Florida
I did drop the fuel bowel and accelerator pump and found no debris and also ran a tank of gas with carb cleaner but it didn't help. I guess I'll do a rebuild on the carb. I initially thought carb/fuel problem but the backfire made me think ignition system problem. Thanks
Stellar HDF Member
Joined: Nov 2010
Posts: 3,113
Likes: 1,145
From: Directly above the center of the Earth
If it's not your only transportation, check things like lifters, valve springs, stuff like that. Oh, and of course your connections to the battery and ground(s).
Cruiser
Joined: Mar 2012
Posts: 121
Likes: 1
From: NTex
Could be the ignition. Does it happen after it warms up a bit? If so take the cone cover off and spray some contact cleaner behind the trigger plate. That may clear it up.
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Seasoned HDF Member
Joined: May 2008
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From: South Carolina
Those would be the last things I would check...
According to the original post, the engine cuts out intermittently, which sounds like an electrical problem, there is no mention of any unusual noise.
OP: when the engine quits, does the entire electrical system cut out ?
According to the original post, the engine cuts out intermittently, which sounds like an electrical problem, there is no mention of any unusual noise.
OP: when the engine quits, does the entire electrical system cut out ?
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Thread Starter
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Intermediate
Joined: Mar 2013
Posts: 39
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From: Florida
Actually there have been a couple of times that when starting for the first time of the day it would not start right away. It would crank over but not start, a few minutes later it would start. When I am done riding I always turn off the fuel petcock. Maybe the remaining fuel is leaking out of the bowel and it tales a few minutes for it to fill back up after I turn it back on. There is no unusual noise and the rest of the electrical seems fine, lights stay on and starter cranks.
Thread Starter
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Intermediate
Joined: Mar 2013
Posts: 39
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From: Florida
It only seems to happen after I have been riding for a while though there have been a couple of times that when starting for the first time of the day it would not start right away. It would crank over but not start, a few minutes later it would start. When I am done riding I always turn off the fuel petcock. Maybe the remaining fuel is leaking out of the bowel and it tales a few minutes for it to fill back up after I turn it back on. There is no unusual noise and the rest of the electrical seems fine, lights stay on and starter cranks.
