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#1 |
Account Suspended
Join Date: Mar 2014
Location: Aquashicola PA
Posts: 143
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'67 250 1bbl high idle once it's hot
So like the title says, my '67 with a 250 and 1bbl has a high idle once it's fully warmed up. Starts up from cold very easily and idles nicely though. What are some things to check first?
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#2 |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,518
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Re: '67 250 1bbl high idle once it's hot
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Does the choke open up all the way when it is at operating temperature? Are you testing it parked or are you actually driving it? LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#3 |
Registered User
Join Date: Mar 2004
Location: Hoytsville, Utah
Posts: 3,365
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Re: '67 250 1bbl high idle once it's hot
Manual choke? If so, adjust the idle when it's warmed up and then when you pull the choke, it will give you a higher idle cold.
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'68 Panel Project Boogie Chillin' '68 C-10 Ol' Green |
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#4 |
Account Suspended
Join Date: Mar 2014
Location: Aquashicola PA
Posts: 143
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Re: '67 250 1bbl high idle once it's hot
After my last post I read your post more carefully and now understand what you mean. Makes perfect sense to me now. Sounds like my idle is set too high and that's why I need no choke to start it. Now to figure out which screw does what on that carb and get that choke cable working properly.
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#5 | |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,518
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Re: '67 250 1bbl high idle once it's hot
Quote:
LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#6 |
Registered User
Join Date: Mar 2004
Location: Hoytsville, Utah
Posts: 3,365
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Re: '67 250 1bbl high idle once it's hot
Funny. I have to choke mine even if it's a hundred degrees out!
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'68 Panel Project Boogie Chillin' '68 C-10 Ol' Green |
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#7 |
Account Suspended
Join Date: Mar 2014
Location: Aquashicola PA
Posts: 143
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Re: '67 250 1bbl high idle once it's hot
Hey guys thanks. So more details....it's a manual choke, but even when it's 20 degrees out you don't need it to start the motor. I checked at the carb to make sure the choke is actually off and it is (knob on dash just comes off in your hand as well :-/). The high idle is after it's warmed up after a good couple minutes of driving, not just sitting and idling to warm up.
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