mach111
Novice Class
Posts: 81
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posted July 11, 2002 12:05 AM
1-4k.r.p.m sputter,hesitation.
I need some real pro mechanical advice here for my 01 12.
The past few weeks i have been having a serious 1-4k r.p.m problem with sputtering,surging and hesitation on takeoff in that r.p.m.
Also when i do a 1st-6th gear fast acceleration my bike seems to kinda be holding back,like going against a strong headwind.Sometimes i get a mild quick hesitation when accelerating in the 1st-6th rollon i just described,But for the most part it is TERRIBLE from 1-4k r.p.m's,especially when i am coming to a corner and am dropping the r.p.m's lower, than after the corner i go to accelerate and it sputters & hesitates again if i'm around 2-4k r.p.m's coming outa the corner.i have heard of these bikes doing this mildly,but i have rode other 12's and have had friends ride mine,and it seems like i have the same problem but mine is more intensified.i do take good care of my bike.We thought it was a injector so i had them cleaned and checked.I had my t.b's syncd,airbox is clean, nothing there either.
no vacuum leaks,it's not the p.c,i took it off.
i really need some advise here aside from the "Basics" i have mentioned,i went through the manual and checked out every basic option with no luck.i'm thinking:
can my fuel pump be defective,and still running?i cleaned the in tank screen?,or can my e.c.u have a bug in it.
the bike still is relativly fast,and the problem is minor,but driving me crazy.one other option was the crankshaft sensor,but who knows. the bike is stock except for a few mods:micron serpent pipe,b.m.c filters,bonn box,just the basics, its under warranty,but before i put her down for a month,i'd appreciate some input on this matter.any other suggestions would be greatly appreciated.
  
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Y2KZX12R
Needs a job
CompetitionCNC.com
Posts: 3762
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posted July 11, 2002 01:55 AM
Sounds like you need a pc-III and a good map made.
I'll bet the A/F ratio is all over the place.
A little ignition timing advance will cover some of the stumble up.
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mach111
Novice Class
Posts: 81
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posted July 14, 2002 08:41 PM
fixed!
My t.p.s was way off.(low).was majority of problem.(set back to within factory spec.)also had a wire short going to e.c.u.dont ask me how the tps got set low, i checked it a few month's ago,did no mods to-date and it was off????
stutter gone!!amen.
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