-video f4i- need help troubleshooting inconsistent idle/engine vibrating
#1
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-video f4i- need help troubleshooting inconsistent idle/engine vibrating
i am just doing quick revs on the throttle throughout the entire video.. when it jumps above 2.5k it is sticking by itself.. at the end i set the camera on the bike so you can get an idea of how much the engine is vibrating back and forth
video: http://www.youtube.com/watch?v=C1BcComMZ7k
[youtube]http://www.youtube.com/watch?v=C1BcComMZ7k[/youtube]this didnt happen immediately after i changed my tank out.. it happen the first day i took my bike out after changing the tank.. i was trying a lot of spreaders/jumping to the tank when it happen
things i changed before the idle was solid:
swapped my fuel pump/gas tank/cap out on to a new tank
my old tank was semi loose.. you could push it from side to side slightly.. i tightened the new one down pretty tight..
maybe it pinched my map sensor from my airbox? when i took it off i noticed creases in the two wires but they still looked good
problem:
bike runs perfectly under 2500rpm idle.. rev is smooth & no bogs.. engine shakes from side to side though.. very noticeable/abnormal
idle works properly until 2500rpms then when i turn it past 2500rpms it stays at 2500 until i rev the throttle then it sticks close to where the idle would be set if it was working properly
also.. the idle screw turn feels looser then it use to.. use to be fairly tight to turn and it feels pretty easy to turn now
things i checked:
fuses
looked over all the wires/hoses under the tank
took off airbox and checked the idle screw to make sure it wasnt getting held up on anything.. works good moves up/down when i turn the idle screw
2 spark plugs.. both have good spark.. didnt check the other 2 though.. theyre a pain in the *** to take out
video: http://www.youtube.com/watch?v=C1BcComMZ7k
[youtube]http://www.youtube.com/watch?v=C1BcComMZ7k[/youtube]this didnt happen immediately after i changed my tank out.. it happen the first day i took my bike out after changing the tank.. i was trying a lot of spreaders/jumping to the tank when it happen
things i changed before the idle was solid:
swapped my fuel pump/gas tank/cap out on to a new tank
my old tank was semi loose.. you could push it from side to side slightly.. i tightened the new one down pretty tight..
maybe it pinched my map sensor from my airbox? when i took it off i noticed creases in the two wires but they still looked good
problem:
bike runs perfectly under 2500rpm idle.. rev is smooth & no bogs.. engine shakes from side to side though.. very noticeable/abnormal
idle works properly until 2500rpms then when i turn it past 2500rpms it stays at 2500 until i rev the throttle then it sticks close to where the idle would be set if it was working properly
also.. the idle screw turn feels looser then it use to.. use to be fairly tight to turn and it feels pretty easy to turn now
things i checked:
fuses
looked over all the wires/hoses under the tank
took off airbox and checked the idle screw to make sure it wasnt getting held up on anything.. works good moves up/down when i turn the idle screw
2 spark plugs.. both have good spark.. didnt check the other 2 though.. theyre a pain in the *** to take out
Last edited by -matt g-; 07-27-2008 at 05:45 PM.
#4
Re: -video f4i- need help troubleshooting inconsistent idle/engine vibrating
huumm did you put the fuel pump in the right direction???
i was told once on a race forum that that can cause strange problems..(i m not sure why)
um,,
also yer fast idel wax unit could be going bad..(stock idle adjuster)
try this
turn yer bile on..
let it run for 5 min....dont touch the throttle!!!
does the bike idle up to 3rpm ish on the warm up then drop down once its warm..???
let me know what it does after that...
i was told once on a race forum that that can cause strange problems..(i m not sure why)
um,,
also yer fast idel wax unit could be going bad..(stock idle adjuster)
try this
turn yer bile on..
let it run for 5 min....dont touch the throttle!!!
does the bike idle up to 3rpm ish on the warm up then drop down once its warm..???
let me know what it does after that...
#5
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Join Date: Nov 2006
Location: Coopersburg, PA, USA
Age: 37
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Re: -video f4i- need help troubleshooting inconsistent idle/engine vibrating
huumm did you put the fuel pump in the right direction???
i was told once on a race forum that that can cause strange problems..(i m not sure why)
um,,
also yer fast idel wax unit could be going bad..(stock idle adjuster)
try this
turn yer bile on..
let it run for 5 min....dont touch the throttle!!!
does the bike idle up to 3rpm ish on the warm up then drop down once its warm..???
let me know what it does after that...
i was told once on a race forum that that can cause strange problems..(i m not sure why)
um,,
also yer fast idel wax unit could be going bad..(stock idle adjuster)
try this
turn yer bile on..
let it run for 5 min....dont touch the throttle!!!
does the bike idle up to 3rpm ish on the warm up then drop down once its warm..???
let me know what it does after that...
#6
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Join Date: Nov 2006
Location: Coopersburg, PA, USA
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Re: -video f4i- need help troubleshooting inconsistent idle/engine vibrating
that still works.. when i turned my bike on it was at 1k.. went up to 2k until it warmed up and sropped back down to 1k when it was warm
#7
Re: -video f4i- need help troubleshooting inconsistent idle/engine vibrating
ok turn yer stock idle up a bit...it should go up alil higher then that..
the stock idle control yer air to fuel mix...so it mioght be not getting enuff fuel....
#8
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Location: Coopersburg, PA, USA
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Re: -video f4i- need help troubleshooting inconsistent idle/engine vibrating
i took note of how i removed my fuel pump and i know i put it back in the right way.. i might just try swapping back to the other tank to see if anything changes.. lol no clue why this is happening.. and no one has seen anythign like this before??
#11
Re: -video f4i- need help troubleshooting inconsistent idle/engine vibrating
Throttle positioning sensor...Maybe....I forgot what the "key" thing was too look for when that starts going bad....=-)
#14
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#15
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Re: -video f4i- need help troubleshooting inconsistent idle/engine vibrating
i actually cut the zip ties that had my throttle cables held together.. to let them be a little looser.. once of the first things i thought of but i dont think they are stuck.. the bike works perfect when i let it sit idleing at 1k.. the revs are responsive.. they dont stick at all.. drop normal.. but the motor still vibrates
#16
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Re: -video f4i- need help troubleshooting inconsistent idle/engine vibrating
#17
Re: -video f4i- need help troubleshooting inconsistent idle/engine vibrating
is yer grip getting stuck at a certin point..????? you dont need the bike on the check it...turn it all the way let go..see ifit snaps back....
also check yer motor mounts to see if they are loose...
also check yer motor mounts to see if they are loose...
#18
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Location: Coopersburg, PA, USA
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Re: -video f4i- need help troubleshooting inconsistent idle/engine vibrating
nope.. the grip is very smooth & tight. snaps back when i let go of it
ill check my motor mounts quick.. lol shouldve looked at that once it vibrated
ill check my motor mounts quick.. lol shouldve looked at that once it vibrated
#19
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Re: -video f4i- need help troubleshooting inconsistent idle/engine vibrating
nope motor mounts are good.. it must be a mirefire then thats causing the engine vibrations right? what else could cause that
#20
Re: -video f4i- need help troubleshooting inconsistent idle/engine vibrating
Is there anything stuck under where the second Idle cable screws in. the original idle screw or a pebble might be stuck under there