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Old 12-12-2014, 10:27 PM   #3
geezer#99
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Join Date: Aug 2009
Location: Bowser
Posts: 13,777
Re: Trans modulator vacuum

[QUOTE= It was fluctuating, as my 283 was idling erratically going between 800-1200rpm's at idle. I know stock rpm's are supposed to be 500, but it stalls if I drop it to that range.
Any info would be appreciated.
Thanks[/QUOTE]

Best way to cure your erratic idle is to max out your initial timing. Somewhere close to 16 to 18 degrees initial. That will speed up(and smooth out) your motor, then you can turn the idle down and adjust your mix screws.
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