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TOPIC: Re:Accel Duration Screw: OEM Setting Forum Tools Post New Topic Show latest posts Rules

#19781 06MidnightStar (User) Gold Boarder Posts: 768 Accel Duration Screw: OEM Setting 5 Years, 2 Months ago   Roadies: I've searched the Clymer repair manual and the Yamaha service manual and can find no reference to the Accel Duration Screw or its OEM setting. Does anyone know the OEM setting for the Accel Duration Screw on a 2004-up Road* and where that info can be found? Thanks for any help.   Logged     ---- 2006 Midnight Silverado, MaxFlo Air Kit, Roadhouse Classics 2-1 Pipes: OEM manifold, 190 Main, 37.5 Pilot, Needle (3rd groove, OEM white spacer), Maxmix Pro PMS (2.5 turns out), Accel Pump Duration (1 turn out, nut in front), Float Height (w/carb upside down): 16mm, 43+ MPG   The administrator has disabled public write access. #19783 Musky (User) Platinum Boarder Posts: 15137 Re:Accel Duration Screw: OEM Setting 5 Years, 2 Months ago   Mine was out about 5 1/2 the first time I messed with it. I doubt everyones is the same right out of the box.   Logged       The administrator has disabled public write access. #19784 06MidnightStar (User) Gold Boarder Posts: 768 Re:Accel Duration Screw: OEM Setting 5 Years, 2 Months ago   Musky: I have a sinking feeling that you may be on to something. I just read the article in Tech Tips which demonstrates how to adjust the accelerator pump. Sounds like a good place to start unless someone else chimes in soon. Thanks!   Logged     ---- 2006 Midnight Silverado, MaxFlo Air Kit, Roadhouse Classics 2-1 Pipes: OEM manifold, 190 Main, 37.5 Pilot, Needle (3rd groove, OEM white spacer), Maxmix Pro PMS (2.5 turns out), Accel Pump Duration (1 turn out, nut in front), Float Height (w/carb upside down): 16mm, 43+ MPG   The administrator has disabled public write access. #19830 Big Bear (Moderator) Who loves you , Baby? Moderator Posts: 6997 Re:Accel Duration Screw: OEM Setting 5 Years, 2 Months ago   06, I'm not sure what you're trying to achive, but I can tell you alot of guys turn that screw down substantially from its stock location to help with fuel milage, as well as the stalling effect from blipping their throttles.Don't know if that info helps you at all, just passing it along.BB   Logged       The administrator has disabled public write access. #19835 VickK (User) Roadies ROCK ! Fresh Boarder Posts: 60 Re:Accel Duration Screw: OEM Setting 5 Years, 2 Months ago   I have '04' Silverado (bought new) and had the backfire syndromefrom day one. Took it back to the dealer and they turned that accel dur. screw out as far as possible(they even moved the set nut to the other side of the tang to get that extra 1/4&quot; of adjustment) and no change good or bad. I played with it myself and really doesn't seem to chage a damn thing. What are we trying to accomplish? I have the shop manual at home-the one that the techs use. I'll see if I can find the factory setting for you 06.   Logged     I love my Hardley Davidson!   The administrator has disabled public write access. #19838 erizo (User) Platinum Boarder Posts: 1469 Re:Accel Duration Screw: OEM Setting 5 Years, 2 Months ago   vickk12785 wrote: I have '04' Silverado (bought new) and had the backfire syndromefrom day one. Took it back to the dealer and they turned that accel dur. screw out as far as possible(they even moved the set nut to the other side of the tang to get that extra 1/4&quot; of adjustment) and no change good or bad. I played with it myself and really doesn't seem to chage a damn thing. What are we trying to accomplish? I have the shop manual at home-the one that the techs use. I'll see if I can find the factory setting for you 06. the accel duration screw will make no difference to backfiring, and if the mechanic at your dealer thinks it would, i&acute;d have doubts about their competence. the accel pump basically squirts a shot of gas into the throat of the carb when you whack the throttle open to aid initial response that would be slow without it. after checking for inlet/exhaust manifold leaks, the first thing on the carb to try is the P.M.S. screw (underside of the carb, in between the heater connections). normally a quarter turn out stops the backfiring, but this does vary depending on the filter/exhaust configuration you have edit - if it is farting back through the carb, could be the accel screw setting, and apologies to your dealer.<br><br>Post edited by: erizo, at: 2007/03/15 06:24   Logged     be realistic - demand the impossible!   The administrator has disabled public write access. #19839 Cougar (User) Platinum Boarder Posts: 3210 Re:Accel Duration Screw: OEM Setting 5 Years, 2 Months ago   Vickk Adjusting the accel pump will affect the blipping backfire like BB said but if its backfiring on decel, like erizo said check for exhaust leaks then adjust your pms....and removing the &quot;AIS&quot; will also help as well......Coug   Logged       The administrator has disabled public write access. #19858 06MidnightStar (User) Gold Boarder Posts: 768 Re:Accel Duration Screw: OEM Setting 5 Years, 2 Months ago   I would appreciate it. Thanks.   Logged     ---- 2006 Midnight Silverado, MaxFlo Air Kit, Roadhouse Classics 2-1 Pipes: OEM manifold, 190 Main, 37.5 Pilot, Needle (3rd groove, OEM white spacer), Maxmix Pro PMS (2.5 turns out), Accel Pump Duration (1 turn out, nut in front), Float Height (w/carb upside down): 16mm, 43+ MPG   The administrator has disabled public write access. #19859 06MidnightStar (User) Gold Boarder Posts: 768 Re:Accel Duration Screw: OEM Setting 5 Years, 2 Months ago   Big Bear: What you've said confirms what I've read on the forums, but I'm more interested in the OEM setting, if there even IS one. Thanks.   Logged     ---- 2006 Midnight Silverado, MaxFlo Air Kit, Roadhouse Classics 2-1 Pipes: OEM manifold, 190 Main, 37.5 Pilot, Needle (3rd groove, OEM white spacer), Maxmix Pro PMS (2.5 turns out), Accel Pump Duration (1 turn out, nut in front), Float Height (w/carb upside down): 16mm, 43+ MPG   The administrator has disabled public write access. #19860 06MidnightStar (User) Gold Boarder Posts: 768 Re:Accel Duration Screw: OEM Setting 5 Years, 2 Months ago   Thanks, brother.   Logged     ---- 2006 Midnight Silverado, MaxFlo Air Kit, Roadhouse Classics 2-1 Pipes: OEM manifold, 190 Main, 37.5 Pilot, Needle (3rd groove, OEM white spacer), Maxmix Pro PMS (2.5 turns out), Accel Pump Duration (1 turn out, nut in front), Float Height (w/carb upside down): 16mm, 43+ MPG   The administrator has disabled public write access.

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