Fuel Injection/Ignition Problem

I have a 2000 FLHT When I turn the ignition switch you should hear a whirring sound that means the fuel injection is working Sometimes (just Lately) it works and others times it does not engage the fuel infection and the bike will not start In addition one time when I got it running I took it for a test and the fuel injection stopped working and the bike cut out Is this a problem with the ignition switch itself or something with the fuel injection Please let ne know if anyone has had this problem
Scootert

pull off your seat and check the yellow wire.

Fuel Injection

Thanks Grease Gun Checked the yellow wire No luck

hMMMM...Did you check to see if you have 12 vdc on the yellow wire when you power up? If you do and you still cant hear the fuel pump energize, there may be a ground issue with the fuel pump. Unfortunately, this requires pulling the fuel pump and inspecting the ground. Make sure you are very careful doing anything with the fuel tank, especially anything electrical. I would disconnect the battery first and ohm out the ground circuit. You dont want any stray sparks around that fuel tank! Good luck.

Is the check engine light on for eight seconds? Is the fuel relay closing?
There is an entire trouble tree to go down in the service manual. This is one system where shot gun trouble shooting is just not a good idea.

There should be a few seconds of fuel pump time where you can hear the pump build pressure then switch off. If the red light is lit, then you usually cannot get a start. If it is out and you do not hear the pump running when you crank it, it could be the relay or the fuse or wiring or the pump or several sensors. What I am getting at is that in order to make a quick diagnosis and repair, get the book and follow the tree.

The fuel pump needs voltage to operate. If there is none going to the pump, backtrack, (relay, fuse block, etc) If there is voltage getting to the pump, the problem is most likley a bad ground or a bad pump.No offense but I would hardly call 'checking voltage to the pump' shotgun troubleshooting. As far as 'the Bible' goes, its good to have the wiring diagrams for reference, but most of the trouble shooting flowcharts either require alot of specialty tools and/or meters, or they just arent very good.

None taken but if you will read many of my posts, I have said the same thing over and over. However, without a manual how do you determine where and what components do what much less where the wiring is going to and from.

Yes your tips are correct and IF you know what is where and what needs to happen to get the relay closed for example, you would be able to proceed right? But what if you don't know?

Why am I referring to it being shotgun troubleshooting? Because there are at least three separate things that control the fuel pump and as you mention that does not include a bad ground or pump. Determining voltage is a great starting point and going backwards is correct but where? Where is the relay? What controls the relay? What does the ECM boot sequence have to do with the relay / pump is the regulator bad? That is where the tree and the bible come in.

If you think H-D's trouble shooting trees aren't the greatest, try the ones for an F4 guaranteed fried brain parts.

The idea of this BBS is to give input and advice and we have a hell of a lot of members like yourself that are willing to help and I certainly do not mean to step on your toes. I have very little time to post and I really appreciate the efforts of our members. So, if I made you feel like I was stepping on your toes, I did not mean to.

No sweat CD. I agree, starting at where the voltage SHOULD be and working backwards is usually a good way to troubleshoot electrical problems. But it is true that it gets involved when we start looking at relays and the ECM voltages, etc. One definitley needs a manual for that. Its just been my experience that the weakest link in the system is everthing AFTER the connection that leads to the pump. The way Harley routes the fuel pump power wire under the seat can cause alot of problems and I always look for the simplest fix first. Anyway, great forum here, I plan on staying tuned. I hope Scootert has found his problem.

Grease Gun