![]() ![]() ![]() I think it's just the nature of the beast, but I haven't tried an electric fuel pump or anything either. Even so, I still get a raw fuel smell and a little black smoke most of the time. With the fuel bypass, mine now starts hot most of the time within a couple of seconds. I found that mine personally likes the owner's manual advice for a flooded engine.pushed and held all the way to the floor (no pumping). The first is to just touch the starter and not push down far on the gas pedal at all. Finally, there are two schools of thought for starting the engine hot. I don't drive it in freezing weather, so I just have to put up with it being a little bit stubborn for the first half mile or so most of the time.basically I can't get on the gas quick or it will want to stall for a bit. I also stretched the exhaust valve body spring so it was always closed. By using one of those bypass fuel filters, I ran a return line to the filler neck, but I think the tank would be better if you could make it happen. I maintain a mechanical fuel pump, but I also have a 7/16" spacer from Bob's Automobilia, and I made a fuel return. My '53 has always started hard hot, largely due to the non-carburetor friendly gas we now have, but also due to the fact that there's a 600* exhaust manifold underneath it. They don't fire hotter, they just retain heat to keep them from fouling, and I don't think that's for just on start up, more for an engine that fouls them while running. Gas has been changed out several times.įirst, hotter plugs won't help, and they could damage your engine by acting as "glow plugs" at higher speeds. Maybe hotter heat range plugs to help it fire when flooded? I just don't know why this is suddenly a problem. Also will install a better carb base insulator. ![]() I am hoping the carb will percolate back to the gas tank but not sure about that. Is there any way to prevent the fuel from percolating into the intake? I am considering removing the glass bowl filter and putting in a tee to return fuel to the tank while running the electric pump constantly. The engine appears to operate in the usual heat range. Either percolation or vapor lock or both at the same time! The only thing I had done was I put a new electric fuel pump on to replace the intermittently working one and I checked and cleaned out the glass fuel filter bowl near the carb. This is a problem even on slightly warm days. Turning on the fuel pump will not fill the bowl until I open a fitting to bleed the vapor from the filter bowl. When idling for a long period the glass filter bowl will empty. With some effort I can get it going after using some starting fluid.Ģ. It appears the fuel percolates into the intake manifold and floods the engine. When parking the car I found it often wouldn't restart. The car spent 8 months in the body/paint shop and when I got it all back together I began having problems I never noticed before.ġ. I found a 6v fuel pump installed near the tank, and the fuel level in the glass bowl filter next to the carb was normally almost full to the top of the bowl even without the pump turned on so I normally never used the electric pump. Historicly the car ran well after I fixed the stuck heat riser and rebuilt the carb. My '50 Buick has been having some fuel supply issues. Thanks for the info, once again brilliant presentation & delivery.Hi all. It also should be pointed out that this problem can effect all mechanical engines that run on fuel, both Bikes & cars. I am having vapor lock issues on my 2008 ultra classic ReplyĪDORE your shorts – i would seilrusoy love to explore your wardrobe and accessory collection, but i think you already know that by now! hehehewhat beautiful para-sailing photos, i took a few when I was in Thailand last Aprilx Lauren Reply My bad ´cause the cap is one that I bought in that “wish” app Reply I recently bought a new cap and I’ve noticed the vapor release when I opened it. THANKS!! The best and the only site that explains to me the lack of Power in my 883. Δ 6 Responses to “How to Check and Fix Vapor Lock on a Harley-Davidson®”Ĭan’t get fuel to EFI. Mail (required) (will not be published).Articles on Harley-Davidson How-to and More ![]()
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