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You are watching: How to adjust idle on fuel injected harley davidson


Hi,I have an "01 fuel infected Roadking. Critical year ns noticed the it rarely went into high speed idle when cold. By the end of the season it was idling low, about 700, 750 rpm. Follow to the hand-operated I am an alleged to hook increase a diagnostic device to a connector, uncover a voltage and make adjustments.The connector has 4 pins according to the wiring diagram. Walk anyone understand which 2 that the pins will offer me the voltage reading? Or, go anyone have any ideas come correcting this issue?Thanks,
When mine plot the exact same I clean and also re-oil the wait cleaner and also replace the plugs and also idle speed returns to normal.
Here"s an simpler way: gain your cycle to operation temperature (this component is important). Disconnect the ISC plug (the one on peak of the accelerator body). Adjust the cold idle to about 1500 rpm"s. Rotate the cycle off; put it back together; and also pull the ecm and also fuel pump fuses for a couple of minutes (under the ideal side cover). You"re done. (after you change the fuses)Ragnar
I had the same trouble with mine "01 (MM efi) road King Classic. I was able to rise my warm idle up to spec (950-1050rpm) by simply transforming the idle convey screw clockwise. I didn"t use a SCANALYZER, and I didn"t disconnect any type of fuses.Here"s how:Go because that a ride, make sure bike is up to temperature. Remove air cleaner. Insert a T10 TORX head v the ideal hole in the backing bowl (see image). The yes, really adjustment screw is behind the plate, yet it"s easy to engage the TORX. Rotate it clockwise to boost idle. Button her earlier up and you"re good to go. I think the difficulty is the the mediate screw actually slowly backs chin out. Mine"s been great for number of months, yet if I require to readjust it again, I"ll probably include a fall or 2 of blue loctite.
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I am no what I must be, desire to be, or expect to be, but by the grace of God ns am no what ns was.—JOHN NEWTON
I agree, Sinker. Ns think on some bikes the idle adjustment screws have a tendency to back themselves out over time. That wasn"t clean from the inquiry if the warmth idle was it s okay or not, however if it"s too low, the cold idle will be as well low as well. May too do lock both. I would likewise pass ~ above the voltmeter and also Scanalyzer. Ragnar
I agree, Sinker. I think on part bikes the idle convey screws have a propensity to ago themselves the end over time. The wasn"t clear from the question if the warmth idle was it s okay or not, however if it"s too low, the cold idle will certainly be also low as well. May as well do lock both. I would likewise pass ~ above the voltmeter and Scanalyzer. Ragnar
I am not what I must be, desire to be, or expect to be, yet by the elegant of God ns am no what i was.—JOHN NEWTON
I agree, Sinker. I think on part bikes the idle convey screws have a tendency to ago themselves out over time. That wasn"t clean from the concern if the warm idle was okay or not, yet if it"s also low, the cold idle will certainly be too low as well. May as well do them both. I would also pass on the voltmeter and Scanalyzer. Ragnar
The cold idle hasn"t yes, really worked because last summer. The warmth idle dropped critical fall. Together a issue of truth the bike provided to obtain to rapid idle and drop nice quickly, and it"s been part time because it has done that. Thanks for the aid everyone. Ns will do both the cold and the hot. Ns am perplexed though regarding why ns would get the engine to operating temp to readjust the cold idle?
You most likely don"t yet if you have the SE race tuner for the MM fuel injection you can plug the bike into your computer and check her throttle position sensor voltage and your idle rpms.
Could be the idle air manage (IAC) is stuck. The IAC is a motorized device that jack-screws the idle setting up in ~ startup and also slowly reduce it ago to normal during warm up.
Thanks because that the assist everyone. I will execute both the cold and the hot. I am puzzled though as to why i would gain the engine to operating temp to readjust the cold idle?The basic answer is due to the fact that that"s the way the hands-on says to carry out it. "Cold" is a range; by getting the engine to operating temperature and also disconnecting the ISC, you remove the variables. Over there is a means to collection the cold idle through a cold engine, however the engine needs to be ice cold, together in an initial thing in the morning. Begin the cycle and change the cold idle so it is between 1200 and 1300 rpms. You need to do this reasonably quickly since as quickly as the engine starts to warm, it won"t work-related accurately. This is an old garage mechanic"s method, and gives sort of a ball park result, however it have the right to work.Ragnar
I had the same difficulty with mine "01 (MM efi) roadway King Classic. Ns was may be to rise my warm idle up to spec (950-1050rpm) by simply turning the idle convey screw clockwise. I didn"t usage a SCANALYZER, and also I didn"t disconnect any kind of fuses.Here"s how:Go because that a ride, make sure bike is as much as temperature. Eliminate air cleaner. Insert a T10 TORX head v the proper hole in the backing bowl (see image). The yes, really adjustment screw is behind the plate, yet it"s basic to communicate the TORX. Turn it clockwise to rise idle. Button her earlier up and also you"re good to go. Ns think the difficulty is the the mediate screw actually progressively backs itself out. Mine"s been good for numerous months, but if I require to readjust it again, I"ll probably include a drop or two of blue loctite.
Sorry to target in yet your write-up actually answered my questions. I have an 05 FXDi and I"ve always thought mine idle was way to high at warmth idle. In fact it sounds prefer it"s still in ~ cold idle and also I can"t "hear" any type of difference between cold and warm. It has actually done this due to the fact that I very first got the thing. I don"t have a tachometer and I realize ns really need one to carry out this right yet I think ns can readjust it by ear until I can number out a tach setup. There has actually only to be one time the my bike had a low idle and also I believed it to be overheating because I check out that if it it s okay to warm the time is retarded by the computer or it only fires on every various other revolution.
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Not a great idea to change the idle speed with the screw!!It have to be done thru the ECM(aka SERT)
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Kriz......Your bike has actually the Delphi efi.....these guys have actually been stating adjusting idles ~ above the Magneti (MM) efi. These approaches won"t job-related on her idle......the Delphi needs to be collection by the dealer or SERT."05 should still be under warranty? let the dealer take treatment of it.
#, I had hoped I might fix it. I don"t think the dealer will solve it. I"ve changed the pipes and done my very own oil changes. According to them ns voided my warranty. :whatever: :2flips: I likewise don"t desire to upgrade to the SERT. HD wants way to lot for the package. Anyway I"ll leave this thread now because it doesn"t worry my EFI. Many thanks for the information though. Learning more every day.

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