Technical help please. Strange problem.
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2nd Gear
Joined: May 2011
Posts: 6
Likes: 0
From: Panama City, Panama
Technical help please. Strange problem.
I own a 2001 RKClassic with MM fuel injection system / stage one air filter and Rinehart complete true dual exhaust.
Bike was running fine but suddenly it started to feel slow. On her kick-stand she revs up to 6,200rpms with no problem.
But on acceleration, first and second feels fine until 4,500rpms from there on she starts to miss, third, fourth and fifth is worst (when she feels load).
I can ride around 65mph on fifth but as soon as I try to give her more gas to accelerate, she starts to miss and it feels like she hits the rev limiter, back up the throttle around 70% and I can keep riding without problems but slow.
-Its nothing to do with speed because when I was riding with the wind on fifth I did 82mph but against the wind I cant do more than 60mph.
-I disconnect and cleaned all connectors from the ECM, fuses box, tps and air temp sensors, changed spark plugs and their cables, cleaned fuel lines and place fresh 92oct fuel.
-I adjust the TPS voltage to .0275 , adjust the cold and hot idle and throttle cables.
-The technician at the HD dealer hook up the scanner and bike shows no codes and for him, she is running fine. (mmmmm?)
I really appreciate some help here.
-Can it be the fuel filter or the fuel pump? Remember bike runs fine until 6,200rpms on her kick-stand.
-Can it be a bad battery? On the HD scanner, charging system was fine on her kick-stand (but when feels load she needs more power??)
Battery is not the ideal for the RK .I purchased one will less amps. But I will not buy a new battery just to test if its the problem.
-Can it be a bad air temp sensor? (the one at the intake left runner) I dont know how to test it. I already test the tps and its working fine.
-Can it be the KPS or the CPS? I guess if they were bad, bike will not run fine even at low rpms.
-There is any other relay or unit that I can check?
Thanks a lot in advance for any help.
George.
Bike was running fine but suddenly it started to feel slow. On her kick-stand she revs up to 6,200rpms with no problem.
But on acceleration, first and second feels fine until 4,500rpms from there on she starts to miss, third, fourth and fifth is worst (when she feels load).
I can ride around 65mph on fifth but as soon as I try to give her more gas to accelerate, she starts to miss and it feels like she hits the rev limiter, back up the throttle around 70% and I can keep riding without problems but slow.
-Its nothing to do with speed because when I was riding with the wind on fifth I did 82mph but against the wind I cant do more than 60mph.
-I disconnect and cleaned all connectors from the ECM, fuses box, tps and air temp sensors, changed spark plugs and their cables, cleaned fuel lines and place fresh 92oct fuel.
-I adjust the TPS voltage to .0275 , adjust the cold and hot idle and throttle cables.
-The technician at the HD dealer hook up the scanner and bike shows no codes and for him, she is running fine. (mmmmm?)
I really appreciate some help here.
-Can it be the fuel filter or the fuel pump? Remember bike runs fine until 6,200rpms on her kick-stand.
-Can it be a bad battery? On the HD scanner, charging system was fine on her kick-stand (but when feels load she needs more power??)
Battery is not the ideal for the RK .I purchased one will less amps. But I will not buy a new battery just to test if its the problem.
-Can it be a bad air temp sensor? (the one at the intake left runner) I dont know how to test it. I already test the tps and its working fine.
-Can it be the KPS or the CPS? I guess if they were bad, bike will not run fine even at low rpms.
-There is any other relay or unit that I can check?
Thanks a lot in advance for any help.
George.
Club Member
Joined: Aug 2007
Posts: 10,393
Likes: 2,060
From: N. Atlanta Burbs
Thinking about a fuel issue right now...
When was the fuel filter changed? Doesn't matter what it will do in the stand, it's what it will do under a load. Sounds to me like it is running out of gas/starving but I'm way over here sitting behind a computer so what do I know.
When was the fuel filter changed? Doesn't matter what it will do in the stand, it's what it will do under a load. Sounds to me like it is running out of gas/starving but I'm way over here sitting behind a computer so what do I know.
Club Member
Joined: Aug 2007
Posts: 10,393
Likes: 2,060
From: N. Atlanta Burbs
One the things about being a Mod here Scotty... got to have good reading glasses as you spend a lot of time reading posts. Have read too many where the fuel filter wasn't feeding good volume even though it had low mileage. OR... hole in the fuel line inside the tank.
HD says to change at 50,000 if I remember correctly... I think that would depend on the region where you fill up the most via dirt in the fuel. The fuel hoses degrade over time as we all know.
About your bed time isn't it?
HD says to change at 50,000 if I remember correctly... I think that would depend on the region where you fill up the most via dirt in the fuel. The fuel hoses degrade over time as we all know.
About your bed time isn't it?
Road Captain
Joined: Feb 2007
Posts: 704
Likes: 23
From: on the mud flats on the edge of slum city
One the things about being a Mod here Scotty... got to have good reading glasses as you spend a lot of time reading posts. Have read too many where the fuel filter wasn't feeding good volume even though it had low mileage. OR... hole in the fuel line inside the tank.
HD says to change at 50,000 if I remember correctly... I think that would depend on the region where you fill up the most via dirt in the fuel. The fuel hoses degrade over time as we all know.
About your bed time isn't it?
HD says to change at 50,000 if I remember correctly... I think that would depend on the region where you fill up the most via dirt in the fuel. The fuel hoses degrade over time as we all know.
About your bed time isn't it?
Changed one filter on a 04 Heritage and guy thought he had a brand new bike LOL
However electrical problems can also present themselves and fool you
And no it's nearly 7am time to go to work............
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Thread Starter
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2nd Gear
Joined: May 2011
Posts: 6
Likes: 0
From: Panama City, Panama
I dont know much in ref to injectors. Can they work fine up to a certain rpms and then not working from there on?? I understand that when feeling load the ECM send signals to the injectors to open more time and more ofthen, right??
The signal for the injectors is sent directly from the ECM by grounding or by sending positive charge impulse. (I want to know if it can be a bad ground wire for the injectors or something like that)
Ok.....a little more information. I bought the bike one year ago with only 7k miles and now its 8,250 miles. Fuel tank/pump/filter where rusted so I replace them. Like two month before problem started I (by mistake and due to a beautifull girl asking me stuff when I was fueling) I put one gallon of diesel fuel into my tank. Started the bike and run for about two miles, since it started to run really bad I stoped at the next fuel station, Inmediatelly I took all the fuel out, took the tank off, clean it as much as possible and placed fuel. Started the bike and run like crapp for some minutes and eventualy started to run good (hopping that all the diesel left in the system burn out)
Some body told me that it was not a big deal but
Can this fu**up my injectors / pump or filter????
The signal for the injectors is sent directly from the ECM by grounding or by sending positive charge impulse. (I want to know if it can be a bad ground wire for the injectors or something like that)
Ok.....a little more information. I bought the bike one year ago with only 7k miles and now its 8,250 miles. Fuel tank/pump/filter where rusted so I replace them. Like two month before problem started I (by mistake and due to a beautifull girl asking me stuff when I was fueling) I put one gallon of diesel fuel into my tank. Started the bike and run for about two miles, since it started to run really bad I stoped at the next fuel station, Inmediatelly I took all the fuel out, took the tank off, clean it as much as possible and placed fuel. Started the bike and run like crapp for some minutes and eventualy started to run good (hopping that all the diesel left in the system burn out)
Some body told me that it was not a big deal but
Can this fu**up my injectors / pump or filter????
Last edited by Georgepty; Apr 3, 2012 at 05:01 PM. Reason: More info.
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Road Captain
Joined: Feb 2007
Posts: 704
Likes: 23
From: on the mud flats on the edge of slum city
Injectors are powered up all the time and ECM supplies ground to fire.
However if injector is blocked then even if ECM powers it up for 15ms it might only release the same amount of fuel as a 10ms burst.
I have seen diesel get put into bikes by mistake and emptying the tank and refueling usually solves the problem.
Faulty / loose spark plugs, spark plug leads, coil can all do what you are experiencing as well.
Hard to diagnose over the internet........
However if injector is blocked then even if ECM powers it up for 15ms it might only release the same amount of fuel as a 10ms burst.
I have seen diesel get put into bikes by mistake and emptying the tank and refueling usually solves the problem.
Faulty / loose spark plugs, spark plug leads, coil can all do what you are experiencing as well.
Hard to diagnose over the internet........
Thread Starter
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2nd Gear
Joined: May 2011
Posts: 6
Likes: 0
From: Panama City, Panama
I know its hard to point out a problem from a distance but you all are really helping me. I will need to fix this on my own and you all are showing me the way.
Yesterday I went for a test ride. Checked the spark plugs at normal idle operation and they looks ok. My home is on a hill so when I came back, I acelerate her until she miss again and I kill all the power. I took out the spark plugs and they came out really white.(lean) And something that gets my attention is that there was no gasoline smell, you know, the one you normaly gets when opening a combustion chamber.
Spark plugs are new (third set on two weeks), S-P cables are new too.
This is showing (or at least I beleave so) that my problem is that engine is not receiving enough fuel. If the problem were the coil/s-plugs or their cables, then spark plugs should show some gasoline.
Maybe right??? or do I miss something here??
Yesterday I went for a test ride. Checked the spark plugs at normal idle operation and they looks ok. My home is on a hill so when I came back, I acelerate her until she miss again and I kill all the power. I took out the spark plugs and they came out really white.(lean) And something that gets my attention is that there was no gasoline smell, you know, the one you normaly gets when opening a combustion chamber.
Spark plugs are new (third set on two weeks), S-P cables are new too.
This is showing (or at least I beleave so) that my problem is that engine is not receiving enough fuel. If the problem were the coil/s-plugs or their cables, then spark plugs should show some gasoline.
Maybe right??? or do I miss something here??
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sledbum
Ignition/Tuner/ECM/Fuel Injection
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Feb 11, 2013 06:18 AM
