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  1. #11
    2 Da Street, Knobs R Gone FinalImpact's Avatar
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    Re: Another Stalling Thread

    FWIW the ECM is just a look up table, when the temps are low (air and coolant) it fuels according to the map which is set to richen the mixture based upon those inputs coupled with the rpm.

    All of that said does your engine change rpm with temperature? If not the coolant may not be circulating through the control circuit or contamination has bound it so it doesn't move.

    That aside it still sounds like the sync screws need adjusted to give you some freedom to set the RPM appropriately.

    It's been a while since I've tinkered but you might just turn them all out 3/4 of a turn (or in) to raise the idle and gain control of the idle speed circuit.

    Make sense?
    So, what does the coolant look like in this machine? Has it been maintained or did it ever pour out looking brown and full of chunks?
    08 Raven w/a few mods...
    R6 Forks, R1 Rear Shock (revalved), 6° Ignition Advance, S1 CAT free Header, SS Mid-Pipe, 2Bro Exhaust, AIS block off plates, Bazzaz Z-Fi Fuel Controller & Z-AFM Data Logger, Air Box mod, CR10E Plugs, 48-Tooth Rear Sprocket, FZ1 Bars, Spider Grips, Adj levers, Powder Coated -Triple, Bars & Rear Sets, Solid mounted rear-sets w/knurled pegs, Dual Headlight, Tail Tidy, LED Combo Brake & Directionals, LED POD lights & Tinted PUIG Wind Screen!

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  3. #12
    2 Da Street, Knobs R Gone FinalImpact's Avatar
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    Re: Another Stalling Thread

    FWIW my fuel controller says the idle AFR is 12.75:1 or 4.7% CO. So if you look in the manual and read the S1 turning data it seemed like it listed something like this for CO%.

    When you get the RPM and the vacuum to spec this gets pretty close (co%). Of course steady state off idle has most of the fuel map around stoir (14.7:1) where the CATs burn efficiently.

    So, before you mess with it to much, throw a vacuum gauge on it and get #. Just use a T right at the vacuum sensor works pretty good.

    Quick rule of thumb.
    Vacuum to high - can be to lean
    Vacuum to low - can be too rich

    To lean can be vacuum leaks or excessive ignition advance.
    To rich can faulty ignition system, restricted air filter.
    08 Raven w/a few mods...
    R6 Forks, R1 Rear Shock (revalved), 6° Ignition Advance, S1 CAT free Header, SS Mid-Pipe, 2Bro Exhaust, AIS block off plates, Bazzaz Z-Fi Fuel Controller & Z-AFM Data Logger, Air Box mod, CR10E Plugs, 48-Tooth Rear Sprocket, FZ1 Bars, Spider Grips, Adj levers, Powder Coated -Triple, Bars & Rear Sets, Solid mounted rear-sets w/knurled pegs, Dual Headlight, Tail Tidy, LED Combo Brake & Directionals, LED POD lights & Tinted PUIG Wind Screen!

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  5. #13
    joshiepoogoose (OP)
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    Re: Another Stalling Thread

    Quote Originally Posted by FinalImpact View Post
    FWIW the ECM is just a look up table, when the temps are low (air and coolant) it fuels according to the map which is set to richen the mixture based upon those inputs coupled with the rpm.

    All of that said does your engine change rpm with temperature? If not the coolant may not be circulating through the control circuit or contamination has bound it so it doesn't move.

    That aside it still sounds like the sync screws need adjusted to give you some freedom to set the RPM appropriately.

    It's been a while since I've tinkered but you might just turn them all out 3/4 of a turn (or in) to raise the idle and gain control of the idle speed circuit.

    Make sense?
    So, what does the coolant look like in this machine? Has it been maintained or did it ever pour out looking brown and full of chunks?
    Interesting... Ive changed out the coolant twice in the 7yrs I've owned it and its never came out looking that super nasty or chunky. it might be worth doing another flush and cleaning out the control circuit

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  7. #14
    2 Da Street, Knobs R Gone FinalImpact's Avatar
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    Re: Another Stalling Thread

    Quote Originally Posted by joshiepoogoose View Post
    Interesting... Ive changed out the coolant twice in the 7yrs I've owned it and its never came out looking that super nasty or chunky. it might be worth doing another flush and cleaning out the control circuit

    Does your engine speed start off higher when cold and drop any amount when warm?

    If no, then something is wrong with idle air control valve.


    I've never taken the IACV off but this gives you an idea...





    08 Raven w/a few mods...
    R6 Forks, R1 Rear Shock (revalved), 6° Ignition Advance, S1 CAT free Header, SS Mid-Pipe, 2Bro Exhaust, AIS block off plates, Bazzaz Z-Fi Fuel Controller & Z-AFM Data Logger, Air Box mod, CR10E Plugs, 48-Tooth Rear Sprocket, FZ1 Bars, Spider Grips, Adj levers, Powder Coated -Triple, Bars & Rear Sets, Solid mounted rear-sets w/knurled pegs, Dual Headlight, Tail Tidy, LED Combo Brake & Directionals, LED POD lights & Tinted PUIG Wind Screen!

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  9. #15
    2007 FZ6 TownsendsFJR1300's Avatar
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    Re: Another Stalling Thread

    ^^^ is what I was referring to much earlier.. Tks Randy
    Scott
    2007 Yamaha FZ6- BD43 headlight mod, PIAA bulbs, Stebal air horn, Scorpion SS pipes-(no DB killers), Speedohealer, HEL SS brake lines, Fenda Extenda, K&P SS re-usable oil filter, custom mounted BMW style electrical outlet(L.S.), Techmount GPS mount with handlebar bar risers/set backs, additional helmet lock, custom mod'ed seat(Spencers), Hyper light-rear running/brake light, custom radiator/fan protector, Techspec tank pads, Grip Puppies, Yamaha rear rack with custom aluminum flat rack.

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  11. #16
    2 Da Street, Knobs R Gone FinalImpact's Avatar
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    Re: Another Stalling Thread

    Ahhh..... I wasn't sure. NP!

    Did you see if OP said the rpm changes as it warms?

    I'd guess one could take the two bolts out and inspect the section with the coolant hoses going into it, but never heard of it being an issue.

    There is the black cap on the other end. One screw holds it on. Inside is nut on the shaft that moves. Maybe gently push or pull on it to see if it moves?
    No brute strength.

    08 Raven w/a few mods...
    R6 Forks, R1 Rear Shock (revalved), 6° Ignition Advance, S1 CAT free Header, SS Mid-Pipe, 2Bro Exhaust, AIS block off plates, Bazzaz Z-Fi Fuel Controller & Z-AFM Data Logger, Air Box mod, CR10E Plugs, 48-Tooth Rear Sprocket, FZ1 Bars, Spider Grips, Adj levers, Powder Coated -Triple, Bars & Rear Sets, Solid mounted rear-sets w/knurled pegs, Dual Headlight, Tail Tidy, LED Combo Brake & Directionals, LED POD lights & Tinted PUIG Wind Screen!

  12. #17
    2007 FZ6 TownsendsFJR1300's Avatar
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    Re: Another Stalling Thread

    Per his earlier threads, runs rich all the time, even hot.

    I suspect the ECU thinks the engine is COLD all the time and keeps it in the "rich fueling mode"
    Scott
    2007 Yamaha FZ6- BD43 headlight mod, PIAA bulbs, Stebal air horn, Scorpion SS pipes-(no DB killers), Speedohealer, HEL SS brake lines, Fenda Extenda, K&P SS re-usable oil filter, custom mounted BMW style electrical outlet(L.S.), Techmount GPS mount with handlebar bar risers/set backs, additional helmet lock, custom mod'ed seat(Spencers), Hyper light-rear running/brake light, custom radiator/fan protector, Techspec tank pads, Grip Puppies, Yamaha rear rack with custom aluminum flat rack.

  13. #18
    2 Da Street, Knobs R Gone FinalImpact's Avatar
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    Re: Another Stalling Thread

    If idle air control valve is stuck or dead, it almost explains the rich no rpm change but stalling is **almost always** a lean condition.

    The only thing that sorta makes sense is the IACV has been stuck for a long time and someone F'd with the sync screws making it what it is.

    Just saying they can handle a lot more rich than they can a little lean. Lets see what happens!

    Wonder if it has a thermostat?
    08 Raven w/a few mods...
    R6 Forks, R1 Rear Shock (revalved), 6° Ignition Advance, S1 CAT free Header, SS Mid-Pipe, 2Bro Exhaust, AIS block off plates, Bazzaz Z-Fi Fuel Controller & Z-AFM Data Logger, Air Box mod, CR10E Plugs, 48-Tooth Rear Sprocket, FZ1 Bars, Spider Grips, Adj levers, Powder Coated -Triple, Bars & Rear Sets, Solid mounted rear-sets w/knurled pegs, Dual Headlight, Tail Tidy, LED Combo Brake & Directionals, LED POD lights & Tinted PUIG Wind Screen!

  14. #19
    2007 FZ6 TownsendsFJR1300's Avatar
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    Re: Another Stalling Thread

    He posted earlier he has to open the throttle a little just to start even when HOT after a long ride (adding air-likely too rich)
    Scott
    2007 Yamaha FZ6- BD43 headlight mod, PIAA bulbs, Stebal air horn, Scorpion SS pipes-(no DB killers), Speedohealer, HEL SS brake lines, Fenda Extenda, K&P SS re-usable oil filter, custom mounted BMW style electrical outlet(L.S.), Techmount GPS mount with handlebar bar risers/set backs, additional helmet lock, custom mod'ed seat(Spencers), Hyper light-rear running/brake light, custom radiator/fan protector, Techspec tank pads, Grip Puppies, Yamaha rear rack with custom aluminum flat rack.

 

 
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