The crank position sensor
Intermediate
Joined: Jul 2009
Posts: 27
Likes: 0
From: Hawaii
How come no one has mentioned the MAP module as I have been having the same problem and I was checking around and found out that the module controls the fuel flow in both Carb and Injected. (at least on 06 models) I also thought that it was the CPM and changed it out and it did run as long as I kept it at half throttle. Which told me it was not the CPM or the coil so now I am going to change out the MAP today and see if it works. Wish me luck and I will let you know in a new posting. Its times like this that makes me wish for an Evolution style Ignition, but alas, its to expensive to do at least for me. Ric
R.I.P. BROTHER
Joined: Dec 2008
Posts: 3,076
Likes: 6
From: Colorado Springs
Hello Everyone you might not know me and this has nothing to do with the MAP module post, but my name is Richelle Smith I am Chuck Smith "Chazmanian" widow!!
I want to apoligize that I have not been able to get on here and say thank you to each one of you for doing what you have done for me words can't express how much I appriciate it!!! Chuck loved talking to you guys sometimes he would be in here typeing away so fast I would say what is so important that you havbe to go that fast and he would turn his head and say "I am proveing a point to someone" lol. Thank you all for being Chucks forum buddy's he loved to write his stories!!! I wish I could have read them so If any one know how to get to some of his post please let me know? my email address is risha.puggles@gmail.com. Sorry I intrupted your conversation but I needed to say thank you and I know Chaz would want me to tell you all "LIVE TO RIDE AND RIDE TO LIVE" NOW HE IS HOGGIN IN THE SKY!!
THANKS The very Lucky widow of the late Chazmanian
Richelle Smith
I want to apoligize that I have not been able to get on here and say thank you to each one of you for doing what you have done for me words can't express how much I appriciate it!!! Chuck loved talking to you guys sometimes he would be in here typeing away so fast I would say what is so important that you havbe to go that fast and he would turn his head and say "I am proveing a point to someone" lol. Thank you all for being Chucks forum buddy's he loved to write his stories!!! I wish I could have read them so If any one know how to get to some of his post please let me know? my email address is risha.puggles@gmail.com. Sorry I intrupted your conversation but I needed to say thank you and I know Chaz would want me to tell you all "LIVE TO RIDE AND RIDE TO LIVE" NOW HE IS HOGGIN IN THE SKY!!
THANKS The very Lucky widow of the late Chazmanian
Richelle Smith
Banned
Joined: Oct 2007
Posts: 11,436
Likes: 13
I hope your coping well Richelle after this SAD TRAGEDY. CHAZ was definetly a character, never really knew what took his life. But it was a sad day for us here, he was one of a kind! Still cannot believe it, seemed to happen so QUICKLY! May he R.I.P.
Not 100% certain on a bike but on a car, a crank position sensor failure will throw your timing off at start up. An over advanced timing will cause your starter to drag.
Stage IV
Joined: Aug 2020
Posts: 4
Likes: 0
From: **** you
your not very bright are you? Starting fluid is the worst thing you can do to an engine...
Stage IV
Joined: Aug 2020
Posts: 4
Likes: 0
From: **** you
Best cheap way to check spark is to pull a spark plug, attach to ignition wire as assembled, hold plug base against the aluminum head and turn over checking visualy for spark across the plug. Very important to keep plug against bare aluminum holding rubber boot not plug itself if is removed you may become the ground and feel a hell of a jolt. Prolonged lack of ground plug can cause damage to coil just a FYI, but if done as explained no issues.
Or purchase of a spark checker keeps it safer.
If your 100% sure you have spark but no fuel. Do you hear hear fuel pump cycle when you turn the run switch on? If you do the next things to check are fuel pressure fuel flow, injector spray and flow. If you do not hear it cycle, electrical needs to be checked, fuses, relay, wires and fuel pump itself.
I am not a fan of starting fluid
Or purchase of a spark checker keeps it safer.
If your 100% sure you have spark but no fuel. Do you hear hear fuel pump cycle when you turn the run switch on? If you do the next things to check are fuel pressure fuel flow, injector spray and flow. If you do not hear it cycle, electrical needs to be checked, fuses, relay, wires and fuel pump itself.
I am not a fan of starting fluid
Stage IV
Joined: Aug 2020
Posts: 4
Likes: 0
From: **** you
2005 FXSTBI...tc88 . They had a recall on CPS, it won't start when it fails. No, it won't throw your timing off...it just won't send the signal....where do you people come from...cars and bikes have very little in common when it comes to first gen Delphi efi on a Harley.
Stage IV
Joined: Aug 2020
Posts: 4
Likes: 0
From: **** you
Wrong on everything
I dont know if you solved the problem or not so ill go over a few things that it might be. In my experience as a tech ive had quite a few crank position sensors go bad. Typically when the sensor goes out the bike will be VERY difficult to start. I mean, it will just turn over and over and eventually start. Once it starts then itll run fine. I honestly dont know any tests for the sensor as when i would check everything else and narrowed it down to the crank position sensor i kept a working spare and would just switch it out for a known good one.
Second, if you have narrowed it down to a fuel problem then the first place i would definately check would be the fuel pump, specifically the fuel lines. I always use a fuel pressure tester and connect it between the quick disconnect coupling between the fuel line and tank. check the pressure. But assuming that you dont have a tester, the first thing i would do is pull the dash and the fuel pump plate. You can just take out the torx screws and lift it up not taking it completely out. then reconnect the dash and turn the ignition switch on. You will hear the fuel pump turn on for aprox. 5 sec. The thing you want to look for is any fuel spray in the tank. The hoses have a bad tendency of springing a pinhole leak in them and leaking back into the tank thereby giving you little or no fuel pressure even though the fuel pump is working.
I dont know how many people notice the fact that ever since they gas stations have switched over to a percentage of ethanol but more and more bikes get fuel problems. Ethanol eats plastic and rubber parts. If a car (or bike) will be running ethanol gas the fuel system has to have special plastic and rubber parts, o-rings, etc...
Being a tech i saw a huge increase in fuel problems with the implement of ethanol in the gas. Thats why if you look at the owners manual on an older car it will say that you should not run ethanol gas. Newer cars and bikes have the necessary changes in the fuel system to accomodate the running of ethanol gasoline. Older bikes dont.
Second, if you have narrowed it down to a fuel problem then the first place i would definately check would be the fuel pump, specifically the fuel lines. I always use a fuel pressure tester and connect it between the quick disconnect coupling between the fuel line and tank. check the pressure. But assuming that you dont have a tester, the first thing i would do is pull the dash and the fuel pump plate. You can just take out the torx screws and lift it up not taking it completely out. then reconnect the dash and turn the ignition switch on. You will hear the fuel pump turn on for aprox. 5 sec. The thing you want to look for is any fuel spray in the tank. The hoses have a bad tendency of springing a pinhole leak in them and leaking back into the tank thereby giving you little or no fuel pressure even though the fuel pump is working.
I dont know how many people notice the fact that ever since they gas stations have switched over to a percentage of ethanol but more and more bikes get fuel problems. Ethanol eats plastic and rubber parts. If a car (or bike) will be running ethanol gas the fuel system has to have special plastic and rubber parts, o-rings, etc...
Being a tech i saw a huge increase in fuel problems with the implement of ethanol in the gas. Thats why if you look at the owners manual on an older car it will say that you should not run ethanol gas. Newer cars and bikes have the necessary changes in the fuel system to accomodate the running of ethanol gasoline. Older bikes dont.
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Feb 27, 2013 08:36 PM
