Submitted: 8 years ago. The '96 and later Harley's have a vacuum operated petcock if it is still stock. If you're not getting any vacuum or the diaphgram in the petcock is damaged, you won't get any fuel to the carb. Recommended Services. I may not be able to get back on-line until Monday evening or Tuesday. 21. Engine Will Not Start. $60 latter at the stealership took me all the way. In 1996, Harley went to a vacuum operated fuel petcock. The vehicle is not getting any fuel to the engine. Found the problem few days ago. However, Harley may need a different fuel sometimes. I have a 2004 Harley Roadking Classic, I went riding to day, oppss, and tipped it over onto the crash bars, sitting at a light. Yea!! Although they share arguably the same V-Twin engine design, Harleys do not use the same fuel. For those of you who haven't noticed or are stuck back in the 80's, a large number of the bikes coming from Milwaukee have fuel injection installed. It was still running, I stood it up and started down the road, it started out ok, just for a 1/2 block, then started acting like it was starving for fuel, I … To test, pull the hose off the carb and put the end of it in a catch can. Put a pressure test on the system and found it would not hold. To test the final fuel injector, connect it and pull a prior connected electrical plug. Resistance Testing. Spin the engine with the starter and watch for fuel coming out of the hose. 2003 Harley Classic, fuel injected. It gets vacuum from the intake maniold or backside of the carb through a small vacuum line. Won't start. Fuel Injector Replacement: $379.42 - $3631.88: Get a Quote: Electrical components are not working Inspection: $79.99 - $89.99: Get a Quote: now the bike is getting no fuel ( i can see a empty fuel filter.) No wonder the pump could not provide the fuel to the injectors. 22. so please be patient if you respond and don't hear right back from me. We always recommend replacing the float needle valve every 2-3 years or immediately following any prolonged storage where a fuel stabilizer was not used. Yes, we said earlier that Harley engines need the fuel of at least 91 Octane to run optimally. Engine Will Not Start-The most likely cause is that the fuel injectors are probably not opening. the valve on the tank is not plugged neither is any of the lines buf for some reason the fuel will not pass through the filter. it's kind of up in the air. Pulled the goods out of the tank and found the plastic fuel line from fuel pump to the filter was broke into. The hose plugs onto the backside of the petcock. New plugs seems to be an intermittient spark, Fuel pump comes on and acts normally. If the engine has a fuel pump, you should not have to prefill lines/filters. The PCM uses the trigger signal from the crankshaft position sensor, and/or camshaft position sensor to pulse the injectors. It has a diaphragm in the backside of it that can develop a hole in it. Disconnect the fuel injector electrical plugs from each of the fuel injectors. 91 Octane means premium fuel, and it is what Harley advises users to use on the bike. Oh well, gotta have it. 20. Harley-Davidson Fuel Injection basics It is a sad day in Hogville. OK so i took the ccarbs out of my Honda 1980 CB650 cleaned them out and put them back in, also in the process i installed a inline fuel filter. When this happens, no fuel gets to the carb or not enough. @t663s33, Fred Clevenger, You did not state your year/make/model/engine so I will post some what generic answer on fuel issue.Ensure you have good fresh gas and that there is fuel flow from the tank, as there may be an internal screen in the tank plugged. E85 pump fuel contains 85% + Ethanol and will begin to damage parts in the carburetor that were never designed for this type of fuel. The mighty Harley is slowly loosing its carburetor. 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