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    Author Topic: rich Idle  (Read 858 times)

    Offline 70 sublime

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    rich Idle
    « on: September 01, 2012 - 01:23:28 PM »
    Hi I was wondering if anyone could help me lean out my engine at idle.
    I have a Holley 860 (Pro System) 512 cu .  Timing is 24 at idle and 36 total.  I have turned the air mixture screws in , only as far without losing throttle responce. Air bleeds are .082 .(more air at idle)      Idle is 1000 rpm, still you can stand behind the car even when you are outside . Other than that the carb is perfect.  Any suggestions?


    thank you.
    Chrisw
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    Offline Chryco Psycho

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    Re: rich Idle
    « Reply #1 on: September 01, 2012 - 02:24:38 PM »
    Does the engine have a lope to it at idle ?
     it could be just the misfiring cylinder causing it to smell rich
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    Offline 70 sublime

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    Re: rich Idle
    « Reply #2 on: September 01, 2012 - 05:13:30 PM »
    Cam is 555 lift 236 duration....

    Checked all the plugs after driving , all look great no misfire........only black after idle
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    Offline Chryco Psycho

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    Re: rich Idle
    « Reply #3 on: September 01, 2012 - 06:44:54 PM »
    Is the idle smooth ?
    increase the airbleeds some more there should be an idle screw on the secondary side also made open that a bit more & close the front
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    Offline Chryco Psycho

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    Re: rich Idle
    « Reply #4 on: September 01, 2012 - 06:45:42 PM »
    What vacuum do you have at idle ?
     Is the powrvalve closed , it needs to be at least 1.5 " lower than your idle vacuum in gear
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    Offline 70 sublime

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    Re: rich Idle
    « Reply #5 on: September 01, 2012 - 11:25:47 PM »
     vaccum is 13 at idle  and it does idle smooth....I believe the power valve is 4.5.....

    Is there anyway i can give you a call?


    Chris
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