I will defiantly look into it, I also found another post on a different forum from the same guy who origanlly started this one and on it he claimed the issue turned out to be an intermittent fault with the kill switch! so after I look for the wire (and if it isn't the problem) this will be next on my list!

 

well I ended up installing the new kill switch and then test rode it and it didnt seem to help. once I got it home I remember someone mentioning it could be the battery going out, so I went to take the battery out and noticed that on the positive terminal the screw wasnt completely tight? so I took the battery out and had it checked and all signs where good, so I reinstalled it and now the bike is running like a champ. I am not to sure if it was the new kill switch, tightning the screw, or maybe the ecu reset fixing the problem... either way its running good so I figured I would share!

 

Hello Everyone,

I am having this very same problem....just started today. I am currently trying to isloate the problem... further than electrical. One of my friends who rides said he had the same problem....he ended up changing his map sensor. But what I have read on here is...the problem seems to be caused by different culprets and fixed by different things...depending on the culpret.

I just bought a new battery....everything is tight...replaced the battery yesterday....problem just started today. I did accidentlly redline my bike today under load...however...did not spin a bearing or anything....I think I may have shorted something out or cause my ecu or map sensor to freak.

I have never seen a map sensor go bad on a bike before my firend told me about his....however I have seen them act up on cars...similar effects.

 

i changed the plugs, cleaned filter, oil etc... and never gave me any error codes
still did the issie.

i put it into dealer mode and this time for the first time it have me 9 blinks. thats the IAT (intake air temperature ) sensor. i ordered it and im gonna install it to see if it fixes the problem. ($19 sensor) ill let you guys/girls know if it fixes the problem.

 

Hello All,

Well this weekend I finally had some time to work on the bike. I am still trying to isolate. So far I have checked the engine oil level...did this by starting the bike up for about 2 mins..letting it warm up...shut it off...wait 3 mins and checked the oil site glass. Found out my oil level was low...this could be apart of the problem or the problem since I read in the service manual the bike will cut off if oil pressure is low...to reduce serve engine damage. Since I had all the fairings off...I decided to dig a little deeper.

Second..I ops checked the fuel shut off relay..this is located on the right side frame under the rear fairing. Hooked up a 9V battery to brown/black wire and black/white wire. Hooked up an ohm meter to the solid brown and other black/white wire...checking for continuity...this checked good. I could even hear the relay click when power was hooked up.

Third...I checked the IAT sensor for resistance. For this all I did was pull the senor out and hook up an ohm meter. Sensor showed about 2200...service manual states IAT is good if within 2000-8000. So IAT checked good.

I even pulled the spark plugs to see if there were any tall tale signs of anything...all spark plugs looked normal.

Since fuel tank was up...I also did a fuel flow test. For this I jumped the fuel shut off relay connector...used jumper wire on the solid brown and black/white. Depressurized the fuel system by loosening the fuel service bolt. Then disconnected the fuel return line...plugged the end leading into the fuel tank. The fuel return hose is the hose routed to your fuel pressure regulator. I grabbed one of my daughter's old baby bottles since it had cc's and oz's. (do not worry I will not reuse this ) I then put the open hose end into the bottle....turned the key to the on position...waited ten seconds (used a watch)...turned the key off. (fuel should pump into the container when do this....if it does not then you did not jump the correct wires or there is a bad jumper connection. The bottle I used only showed 100cc of fuel...the manual says there should be 180cc. I did this a few times just to make sure me depressurizing the fuel system did not have anything to do with the low reading)

So I have a fuel obstruction somewhere....I checked the fuel lines for obstruction...did not find anything. I took out the fuel pump to gain access to the fuel filter....disconnected that and used a straw to blow through it....fuel shot out fine. (however does not mean there is a restriction in the fuel filter as I am getting some fuel...just not the required amount)

Since pump was out I inspected the filter sock and return filter (the shiny sponge looking thing) All checked good.

I still need to check fuel pressure to further diagnose the problem..I may have a weak pump or in fact a resrtiction in the fuel filter. I just hit 22,000 miles so changing the fuel filter is not a bad idea at this time...even if I did not really need one to fix this problem.

I will not have much time to work on my bike during the week since i have work, school and family. However I will continue to keep everyone updated on my progress.

I really would like to come to an understanding of what causes this problem rather than just fix it.....so the peeps after us will know what not to do or what to look out for....as well as how to fix the problem the first time around.

 

what would be the bikes characteristics if the oil level was a lil low or it was just at the point of low when you get hard on the throttle?

 

ok...ive been looking up this issue for a couple days and i got a few ideas of thing to check out, but i want to make sure i am having the same issues as the other guys. i have an 02 f4i had it for about 5 years now and last yeari was riding with my wife it was really hot out and we had riding for quite awhile, well the fi light came on and the bike just died on me mid ride at about 30 mph. we sat and waited about 15 minutes i tried starting it and it started right up and we went on our way. this problem did not occur again til the next riding season, same problem so i just waited and it started about 10 minutes later, after that i sarted have another fi issue i didnt have before. during start up i would get no fi light andwith the no fi light i wouldnt here the fuel pump turn, so obviously the bike wouldnt start. id play with the kill switch for a bit and then the light would come on and the bike would start!

anyways to make a long story a lil shorter...i just took my bike out for hte new season ahead and it is having all kinds of problems with the fi. no fi light during start up...bucking and fi light flashing on and off while riding, and the other day for the first time ever i pulled to a light adn then the bike just died on me right there at the light, i couldnt get it re-started so pushed it to the side and waited a good 15 minutes or so got it started and headed home.

i have read to check the kill switch wich i have and it seems good maybe i should try an FPR replacement. i was just looking for some advice from people having simular problems and how they resolved them.

thanks

 

That's a tricky question; not to sure about the characteristics. I say tricky because when you get hard on the throttle....oil pressure actually increases...you would have to be pretty low on oil to notice something. All I know is when the oil pressure is low the bike has a fail safe....to shut the bike off.

You can somewhat tell you have low oil on start-ups....if it takes longer to start ....or it starts then stops right away...or sounds harsh when starting then you can bet your low on oil. If you're really really low on oil... multiple attempts to start can actually sieze your engine....piston rings and cylinder walls with no oil do not get along to well.

One should check their engine oil on a regular basis......yeah someone can tell me that again....or slap me for not listening to my own advice.

 

Hi and hello! Your problem sounds very similiar to my problem with the FI light....however some parts did not match up. The first time it happened with your wife....that is. Did the bike buck with your wife on it and do you remember the temp reading on the gauge? If anything that part did sound like some sort of wiring problem (short to ground/open short)....since the pump would prime with FI light on and would not with FI light off (keep in mind the FI light is just an indicator...its attached to other parts on the bike...sorry I do not have the wiring diagram in front of me right now).

Anyhow the last part of your post sounds exactly like my problem. I am still working on the trouble shooting. I did not have time to work on bike this weekend...so did not get anywhere new.

I have a Honda fuel press gauge....crazy how Honda used the same fuel service bolt on their bikes and cars. Anyhow....I need to buy a new gasket to properly seal the pump back in the tank...or I might just try it anyway with a bit of fuel leaking from the tank (I do not recommend this) But I am trying to find out how much psi my fuel system is putting out....since my bike failed the fuel flow/volume test.

I took a further look at my fuel filter and its good to go...no restrictions.

So I am down to either a fuel pump or fuel press regulator....I have read on other forums about the fuel press regulator going bad prematurely. Also if my fuel press is low the service manual tells to check the fuel pump and FPR.

I checked voltage going to my pump and it's within spec...shows same batt voltage going to it....so its not in the wiring.

As I do more checks....I will post them up....

If you do change the FPR let us know and post the results. Also check your oil level...I would like to see if that has thats something we have in common....tyring to find common issues related to this problem.

Last question a faulty fuel system will result in poor overall performance...for instance when your in 4th gear mid rpm and you get on the throttle....there is sort of lag in power....this can go for any gear actually....have you noticed a decrease in power?

No offense to you or anyone...but its someting you notice if you ride a lot or know your bike very well.

Just trying to piece data together....can you believe there are no TSB's for this problem.

 

Hello all,

So today I was riding down the 95, must have been going 75-80 when the FI light came on and the bike just dramatically slowed... its only completely cut off but twice. I was doing all I could to keep it going. I have really noticed the bike has been really slugish throughout all gears esspecially in the higher RPM's. I know some one mentioned possiably Fuel Filter... That would be my guess... I cant understand what would cause the problem to be speradic. But becoming more frequent. I just hit 21k, bought it with 18k... Bike was in perfect condition till I got it. Dropt it once and the wind has blown it over twice. Only changed the oil since buying it. havent had any problems since I have had it other than this.... Not to proficient on Bikes but enjoy learning... When I get a garage it will be game on.