Missing and Back fire
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Cruiser
Joined: Jul 2013
Posts: 232
Likes: 54
From: Bedford Indiana
Missing and Back fire
I've got a 1988 Softtail. I've got a slight occasional miss in the engine both warming up and running at high way speed. It will run along fine and then just like it misses a beat. It may do it every mile or may not do it again for 5 miles.
I had this problem last year as well and it quit running all together so I took it in to a shop and he replace the ignition. It was freezing weather so I tested it a couple miles and it seemed fine. Now that I'm really riding it again I find that miss is still there.
Last couple days I've noticed the petcock is dripping as well. I tried just tightening every thing up there. Wiped it all clean and road about 20 miles today and it never missed out a bit as I headed out and it made me wonder if that was the reason. May be it could have sucked a random bubble in there where it was leaking. After ten miles I stopped to check out the petcock and it was dripping so I headed home. Guess what, it started that random miss in the engine.
Any suggestions? I plan to drain the tank tomorrow. Pull the petcock off and look it all over. Then put it back together with some teflon tape on all the threads. Can't tell for sure with it together but it LOOKS like it may not have any pipe dope on the threads right now.
Could this leak really cause it to miss out? Could the drip blowing back on the electronics and ignition area may be cause some intermittent missing? It's really just enough of a leak to make a mess not enough I've ever noticed any fuel smell on my cloths.
I had this problem last year as well and it quit running all together so I took it in to a shop and he replace the ignition. It was freezing weather so I tested it a couple miles and it seemed fine. Now that I'm really riding it again I find that miss is still there.
Last couple days I've noticed the petcock is dripping as well. I tried just tightening every thing up there. Wiped it all clean and road about 20 miles today and it never missed out a bit as I headed out and it made me wonder if that was the reason. May be it could have sucked a random bubble in there where it was leaking. After ten miles I stopped to check out the petcock and it was dripping so I headed home. Guess what, it started that random miss in the engine.
Any suggestions? I plan to drain the tank tomorrow. Pull the petcock off and look it all over. Then put it back together with some teflon tape on all the threads. Can't tell for sure with it together but it LOOKS like it may not have any pipe dope on the threads right now.
Could this leak really cause it to miss out? Could the drip blowing back on the electronics and ignition area may be cause some intermittent missing? It's really just enough of a leak to make a mess not enough I've ever noticed any fuel smell on my cloths.
Thread Starter
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Cruiser
Joined: Jul 2013
Posts: 232
Likes: 54
From: Bedford Indiana
Replaced the leaky washers on the petcock today and in the process I think I've fixed that little intermittent miss I've been experiencing since I bought this last year.
There was a vacuum fitting that should have been plugged. Since I bought it used and saw it plugged I never noticed or even thought to look for a vacum leak like that. I just saw that it had nothing on it and it was sucking air, started looking for the hose that must have come off and never found one. Started checking for what went on there and found out, nothing went on there. On my bike it should just have a rubber cap on it or plug, what ever you want to call it.
Put that on and rode it 20 more miles with out a hitch. I really think it's fixed now.
There was a vacuum fitting that should have been plugged. Since I bought it used and saw it plugged I never noticed or even thought to look for a vacum leak like that. I just saw that it had nothing on it and it was sucking air, started looking for the hose that must have come off and never found one. Started checking for what went on there and found out, nothing went on there. On my bike it should just have a rubber cap on it or plug, what ever you want to call it.
Put that on and rode it 20 more miles with out a hitch. I really think it's fixed now.
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