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12-08-2004, 06:56 PM
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#1 |
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Senior Member
Join Date: Mar 2003
Location: St robert Mo
Posts: 2,001
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Carb adjust
I was idleing rough and low after this last tank of gas. I adjusted the idle mixture screw on the carb a little and it cleaned up. Could this the change over to winter gas? Or is it normal to have to tweak it in the winter or ever now and then? It was like hunting for rpm up and down about 100 rpm?
Thanks for any input. P.s. holley carb
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1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO |
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12-08-2004, 07:16 PM
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#2 |
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Gentleman Jim Driver
Join Date: Nov 2002
Location: Poulsbo, WA
Posts: 1,553
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I have had to turn up my idle on my Holley equipped trucks pretty much every winter. The spring loaded screw for idle speed tends to very slowly walk out over time. I think it just becomes more noticable when it gets cold and the engine doesn't want to idle easily. (Plus the crap winter fuel additives don't help...)
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Joe '75 GMC Gentleman Jim '84 Chev C10 Short Wide - Super duper plain (manual steering, manual brakes, no dome light, no cig lighter) '85 Chev C10 Short Wide - Super plain Vortec 4.8 4L60E trans also: '81 K30, '83 C30 Crew Dually, '84 M1028 CUCV, '85 M1009 CUCV, another '85 C10 SWB, '89 R3500 Flatbed |
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12-08-2004, 07:50 PM
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#3 |
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Senior Member
Join Date: Mar 2003
Location: St robert Mo
Posts: 2,001
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I also adjust the idle mix screws
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1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO |
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