Common spark plug fouling help!!???!!!???!!!??? - TwoWheelForum: Motorcycle and Sportbike forums
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post #1 of 24 (permalink) Old 04-12-2007, 11:40 PM Thread Starter
 
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Common spark plug fouling help!!???!!!???!!!???

Man I just changed out the plugs on my bike like 1 week ago and was riding this morning everything was fine came home shut the bike down for a couple hours. Went back on a ride and it was good also.....then i went to go again and now it seems to have a miss especially at low rpms and take offs i was just wondering how often plugs foul in these bikes???? I think it might have something to do w/ the map. the guy had a full yoshi exhaust put on the bike when he bought it and they remapped the bike for him befire he left with it. I just bought this bike a week ago it a 02 cbr 954 w/ 2600 miles on it. the only thing the previous owner told me was to be sure that i dont just start it and kill it before it warms up while its on the "choke". and i havent done that....I guess ill have to take it to the shop and let them see what they think.
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post #2 of 24 (permalink) Old 04-12-2007, 11:42 PM
 
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let me get this straight... your fuel injected bike, which has a power commander, also has carbs and a choke?
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post #3 of 24 (permalink) Old 04-12-2007, 11:45 PM
 
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let me get this straight... your fuel injected bike, which has a power commander, also has carbs and a choke?
Impressive.



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post #4 of 24 (permalink) Old 04-12-2007, 11:45 PM
 
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Maybe she's running too rich. Did you pull the plugs and look at them?



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post #5 of 24 (permalink) Old 04-12-2007, 11:46 PM
 
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im still lost... The 954 was carbed, right? might be some gunk in one of the carbs, or maybe it just needs a jet kit and some TLC.
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post #6 of 24 (permalink) Old 04-12-2007, 11:49 PM
 
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im still lost... The 954 was carbed, right? might be some gunk in one of the carbs, or maybe it just needs a jet kit and some TLC.
It might be FI...the 01 F4i was injected so who knows.



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post #7 of 24 (permalink) Old 04-12-2007, 11:49 PM
 
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im still lost... The 954 was carbed, right? might be some gunk in one of the carbs, or maybe it just needs a jet kit and some TLC.
Nope, the Fireblades have been fuel injected since 2000, with the 929.
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post #8 of 24 (permalink) Old 04-12-2007, 11:53 PM
 
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It might be FI...the 01 F4i was injected so who knows.
I was thinking that, but i thought maybe FI only stayed w/ the F series 600, kinda how the fly by wire started only on the 06 r6's.
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post #9 of 24 (permalink) Old 04-12-2007, 11:53 PM
 
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Nope, the Fireblades have been fuel injected since 2000, with the 929.
Good to know.



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post #10 of 24 (permalink) Old 04-13-2007, 12:09 AM
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Bad map!




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post #11 of 24 (permalink) Old 04-13-2007, 12:56 AM Thread Starter
 
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Originally Posted by NONE_too_SOFT View Post
let me get this straight... your fuel injected bike, which has a power commander, also has carbs and a choke?
lol man no its fuel injected no carbs no choke. i just meant that when the bike is cold and you crank it it sounds different than when its warmed up is what i was getting at by "choke". Also it could be a bad map the only thing is that the honda place mapped it, it has no power commander on it. theres no way to undo the map except take it to them i guess. they had me run a ngk 8 instead of the 9 as the 8 is a hotter plug and would take care of the rich problem at startup but it looks like that didnt help as it has a fouled plug again
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post #12 of 24 (permalink) Old 04-13-2007, 09:00 AM
 
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Most likely a bad map. The only reason a plug will foul is because there is too much fuel in the chamber, or there isn't enough spark to burn what is there.
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post #13 of 24 (permalink) Old 04-13-2007, 09:35 AM Thread Starter
 
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so if it is a bad map i been looking at a yoshi programmer i wonder if that would fix the problem.....
im picking up new plugs today
the only reason for the yoshi is the power commander module has to have add on for the timing as i understand it and the yoshi has it all rolled into one
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post #14 of 24 (permalink) Old 04-13-2007, 12:00 PM
 
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lol man no its fuel injected no carbs no choke. i just meant that when the bike is cold and you crank it it sounds different than when its warmed up is what i was getting at by "choke". Also it could be a bad map the only thing is that the honda place mapped it, it has no power commander on it. theres no way to undo the map except take it to them i guess. they had me run a ngk 8 instead of the 9 as the 8 is a hotter plug and would take care of the rich problem at startup but it looks like that didnt help as it has a fouled plug again
may take care of the rich prob at start but you may be getting too hot during a good ride. just a thought... pull those plugs and read em. I run 8's in the winter and 9's in the louisiana summer, myself.
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post #15 of 24 (permalink) Old 04-13-2007, 12:03 PM
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Originally Posted by UhhOhh View Post
so if it is a bad map i been looking at a yoshi programmer i wonder if that would fix the problem.....
im picking up new plugs today
the only reason for the yoshi is the power commander module has to have add on for the timing as i understand it and the yoshi has it all rolled into one
Have you tried changing the gap on your plugs? Clean the air filter too.
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post #16 of 24 (permalink) Old 04-13-2007, 07:12 PM
 
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Originally Posted by UhhOhh View Post
so if it is a bad map i been looking at a yoshi programmer i wonder if that would fix the problem.....
im picking up new plugs today
the only reason for the yoshi is the power commander module has to have add on for the timing as i understand it and the yoshi has it all rolled into one
i'm confused....is there such thing as a yoshi programmer? i didn't know they made those. you can get a power commander and solve that pluse you can get the pcIII usb with the ignition module.

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post #17 of 24 (permalink) Old 04-13-2007, 09:24 PM Thread Starter
 
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yeah saverok yoshi makes a programmer or engine management system as they call it..it runs about 400 bucks but oyu dont have to have all the extras for timing and things like w/ the power commanders as i understand. Everyone take a look at it and post what you think about it...


http://www.superbikesupply.com/index...il&ItemsId=880

Also on another note i checked a couple places around here and no one has a dyno to properly have a map made..i asked the local dealer and he was like yeah we can program it for oyu then i hit him about dyno and o2 measurements he was like sorry man we dont have that here. What a Bummer.. But really the only thing done to the bike was a full yoshi exhaust nothing else other than dealer remapping the bike supposedly for the exhaust system..would a remap even be necessary for a exhaust system?????
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post #18 of 24 (permalink) Old 04-13-2007, 11:46 PM
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Originally Posted by UhhOhh View Post
Also on another note i checked a couple places around here and no one has a dyno to properly have a map made..i asked the local dealer and he was like yeah we can program it for oyu then i hit him about dyno and o2 measurements he was like sorry man we dont have that here. What a Bummer.. But really the only thing done to the bike was a full yoshi exhaust nothing else other than dealer remapping the bike supposedly for the exhaust system..would a remap even be necessary for a exhaust system?????
Most of the time no. Unless the exhaust is an extreme departure from stock, ie: motogp/straightpipe/full exhaust. Or other mods have been done- like an airbox mod or air filter.

So to go from a full aftermarket exhaust back to stock, seems like it would need to be remapped.
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post #19 of 24 (permalink) Old 04-14-2007, 02:09 AM Thread Starter
 
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2 fouled plugs

ok to start with yes it does have a full yoshimura trs exhaust system. Second i have been working on the bike tonight by my lonesome this is the first time for me to change the plugs. I seen it done about a week ago and kinda helped ie:hold the tank and hand me the wrenches point the light here that kinda of stuff.. so after carefully taking my time and getting the wife to gimme a hand until i got the air box outta of the way this is what ive found so far: The far left cylinder and the far right cylinder (sitting on the bike seat) has fouled plugs or extremely black oily kinda to speak residue on them I assume this is fouled being the bike was running like shi* when i parked it. the middle 2 was all good nice and clean but im changing them anyways and ill save the 2 good ones for emergency. Now i got some pics to come here in a lil while. so now im debating on, if weather permitting, tomorrow ride it to the dealer and let them adjust it or whatever hopefully itll make it there it should i rode about 6 hrs the last time and its not but about 30-45 minutes there. or should i find a trailer and take it up there or do you guys think that its from sitting all this time and just being ran every once in a while over the course of 4 yrs that it could have been just that too much idle time on the bike. also i guess i should change the oil in it too huh?
Anyways all input greatly appreciated and the pics of my first bike mechanicing coming up for the plugs..... also was wondering if there was a way to disconnect the lower part of the airbox to get it completely off the bike. I didnt undo the little cable thingy as i wasnt to sure if that could be taken apart or not the little servo thing that operates the flap is the best way i know of explaining it.. ill show pics of it






Well Well Heres the situation on the bike......changed all the plugs as stated above. Started to get everything ready to put the s**t back to gether and low and behold the far left cylinder was full of gas where the butterflies are.....now would that be because i had the tank raised or is my so called low mileage bike got other problems.......PLEASE HELP!!! WHAT WOULD CAUSE THIS....i guess that would explain the fouling of the plugs huh? man this f***ing sucks. there was prolly 4 gals. of fuel in the tank and i checked the tank after i noticed the problem and it looked like the same amount as before. Also fuel being gathered up like that you guys think its in the oil????? Oil level looks the same but......you never know i guess...


Last edited by UhhOhh; 04-14-2007 at 04:45 AM. Reason: MORE PROBLEMS IT LOOKS LIKE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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post #20 of 24 (permalink) Old 04-14-2007, 10:07 AM
 
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Originally Posted by UhhOhh View Post
ok to start with yes it does have a full yoshimura trs exhaust system. Second i have been working on the bike tonight by my lonesome this is the first time for me to change the plugs. I seen it done about a week ago and kinda helped ie:hold the tank and hand me the wrenches point the light here that kinda of stuff.. so after carefully taking my time and getting the wife to gimme a hand until i got the air box outta of the way this is what ive found so far: The far left cylinder and the far right cylinder (sitting on the bike seat) has fouled plugs or extremely black oily kinda to speak residue on them I assume this is fouled being the bike was running like shi* when i parked it. the middle 2 was all good nice and clean but im changing them anyways and ill save the 2 good ones for emergency. Now i got some pics to come here in a lil while. so now im debating on, if weather permitting, tomorrow ride it to the dealer and let them adjust it or whatever hopefully itll make it there it should i rode about 6 hrs the last time and its not but about 30-45 minutes there. or should i find a trailer and take it up there or do you guys think that its from sitting all this time and just being ran every once in a while over the course of 4 yrs that it could have been just that too much idle time on the bike. also i guess i should change the oil in it too huh?
Anyways all input greatly appreciated and the pics of my first bike mechanicing coming up for the plugs..... also was wondering if there was a way to disconnect the lower part of the airbox to get it completely off the bike. I didnt undo the little cable thingy as i wasnt to sure if that could be taken apart or not the little servo thing that operates the flap is the best way i know of explaining it.. ill show pics of it






Well Well Heres the situation on the bike......changed all the plugs as stated above. Started to get everything ready to put the s**t back to gether and low and behold the far left cylinder was full of gas where the butterflies are.....now would that be because i had the tank raised or is my so called low mileage bike got other problems.......PLEASE HELP!!! WHAT WOULD CAUSE THIS....i guess that would explain the fouling of the plugs huh? man this f***ing sucks. there was prolly 4 gals. of fuel in the tank and i checked the tank after i noticed the problem and it looked like the same amount as before. Also fuel being gathered up like that you guys think its in the oil????? Oil level looks the same but......you never know i guess...

I had a bike once and some trash go stuck in the fuel shutoff / petcock. When the bike would sit for a while, certain cylinders would fill up with fuel. My recommendation would be to disassemble to entire fuel delivery system from the tank to the throttle bodies or carbs, inspect and clean everything, then change the oil and plugs again if needed. Your bike may have a vacuum line that shuts the fuel off, and this item may indeed be the issue. Also, check your tank for rust, and get it out if present. HOWEVER, on second thought, I think you said your bike has FI, so, theoretically, fuel shouldn't be able to drain from the tank to the cylinders. Hmmmmm, quite an issue you have there. Probably a good dealer will be your best $olution. I wish you the best of luck.
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