ResQ911
super gas
Reged: Jan 20 2003
Loc: Eau Claire, WI
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I can't seem to get my Holley 4150 HP carb to get below 1100-1200 rpm.
Idle speed screw is backed off all the way. Is there another idle screw or ?
Thanks!!
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VanishPt
master
Reged: Jan 20 2003
Loc: Richmond Va, KeislerTKO 60...
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there is the secondary idle screw that you can only get to from the bottom when the carb is off.
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68Bullit
mopar
Reged: Mar 30 2008
Loc: Western NC
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Before you remove the carb and try for another adjustment, is the throttle arm making a full forward return while at idle? Remove the throttle cable and see if the throttle arm moves forward any.
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DemonKyle
USMC LCPL
Reged: Jan 04 2005
Loc: Marine Corps Base Hawaii
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Quote:
Before you remove the carb and try for another adjustment, is the throttle arm making a full forward return while at idle? Remove the throttle cable and see if the throttle arm moves forward any.
also try the kickdown rod to make sure it isnt getting hung up
--------------------
SOME PEOPLE COME TO RACE... WE COME TO FIGHT THE WAR...
1971 Dodge Demon FC7...warmed over 360.
Come find me at a stoplite 
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ResQ911
super gas
Reged: Jan 20 2003
Loc: Eau Claire, WI
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Tried the throttle lever and no kick-down.............4-speed
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70AARcuda
master
Reged: Jan 20 2003
Loc: las vegas
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vacuum leak.............
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Tony
70 AARCuda Vitamin C
69 Barracuda FB 360 [Email]10.697@123.40[/Email] (MATS 2011)
71 Demon 360 10.720 @120.66 (9-08- 2012 @ Sacramento)
71 Dart Swinger 360 10.719 @ 124.42(1-27-13 Vegas)
71 Duster 360 (11.72 @ 113 5/20/13 vegas)
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chrisf
master
Reged: Jan 19 2003
Loc: British Columbia
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does that model have a choke? if so check that the choke linkage isnt hanging up (fast idle)
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ResQ911
super gas
Reged: Jan 20 2003
Loc: Eau Claire, WI
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No Choke
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**MS68EFI**
mopar
Reged: Jan 22 2007
Loc: Woodinville, WA
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there is a vacuum port out the back of the baseplate for PCV or brakes, make sure that is plugged off or if it is being used than you are good.
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ResQ911
super gas
Reged: Jan 20 2003
Loc: Eau Claire, WI
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No vacuum port either.
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493_DART
The Beast!!
Reged: Jul 11 2004
Loc: rain humid rain humid rain
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another vote for a vacuum leak
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493"/Eddy Rpm's /flat tappet Hughes cam/ 50% pump gas --1.39 60'/6.40/106.6
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6T6Cuda
super gas
Reged: Jul 24 2003
Loc: Cincinnati, OH
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spray carb cleaner down the air bleads. Make sure they do not have any dirt in them... They will cause you not to get the thing to idle or
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