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Hi Guys I have a 1999 Road King Classic seems the rear cylinder is running cold (the bike is stone cold) and at start up the rear cylinder runs cold and the bike sputters at bit at mid to low throttle
however the bike pulls just fine. I suspect the engine temp sensor may be bad, Plugs are both clean and show no sings of fouling rear has spark Im thinking its a fueling issue.
Use a propane torch ( don't light it) stick it in the throttle body & open the torch up. if it smooths out, it could be the injector or a wiring issue. I had an injector go bad on my 99 Ultra a few years back, put 2 new ones in & had one of the new ones go bad a few months later. So I have an old one & a newer one in my bike. But my mileage has dropped & running black smoke on the left bank (cyl1 rear cylinder) so it may be time for some new ones again for me. But I have 130K miles on it.
it was several years ago from Bike Bandit, but I think they stopped carrying HD parts. I have done a search & have found nothing. But it uses what they call a side fill vs a top fill fuel injector. I am looking into some alternatives. Some Toyota's, Nissan's and Subaru's use the side fill. so it is a matter of the dimensions and flow rate. I hope to find out more since I think I may have to replace mine again, or at least the one with 130K miles on it.
Yup have those on the way also rebuilding the entire system while I have the manifold out new fuel lines, o rings, in tank fuel filter , regulator, new fuel pump, the whole works !
Yup have those on the way also rebuilding the entire system while I have the manifold out new fuel lines, o rings, in tank fuel filter , regulator, new fuel pump, the whole works !
Fair word of warning, you will probably need to do a hot-cold idle reset on it after you're done, if you don't have a service manual it may be a good idea to get one.
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