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03-04-2011, 05:55 PM
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#1 |
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Registered User
Join Date: Feb 2011
Location: aiken sc
Posts: 57
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350 wont idle down
i drove it for the first time after i replaced head gasket, i drive it and it jsut idles too fast can it be th timing? the idle screw is ll the way out
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03-04-2011, 06:24 PM
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#2 |
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Redefining LowBudget
Join Date: Mar 2009
Location: lebanon Cow Hampshire
Posts: 4,538
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Re: 350 wont idle down
yopu probally have a vacum leak some where or look on the pass side of your carb the high idle linkage maybe jammed up...but check the leaks first
__________________
1970 C10 CST fleetside 472 ....big dreams little cash... SunShine Syndicate..  Mikes Sandwich Fair Run OCT 8th 2011
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03-04-2011, 07:02 PM
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#3 | |
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Registered User
Join Date: Feb 2011
Location: aiken sc
Posts: 57
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Re: 350 wont idle down
Quote:
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03-04-2011, 07:04 PM
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#4 |
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Redefining LowBudget
Join Date: Mar 2009
Location: lebanon Cow Hampshire
Posts: 4,538
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Re: 350 wont idle down
sounds like your timing is off and it trying to diesal.....
__________________
1970 C10 CST fleetside 472 ....big dreams little cash... SunShine Syndicate.. Mikes Sandwich Fair Run OCT 8th 2011
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03-04-2011, 07:08 PM
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#5 |
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Registered User
Join Date: Feb 2011
Location: aiken sc
Posts: 57
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Re: 350 wont idle down
retard it or advance needed?
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03-04-2011, 07:15 PM
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#6 |
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Active Member
 
Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: 350 wont idle down
Need to retard it some. Do you have timing light? If you're using an hei distributor probably want to be running at around 10-12 degrees btd for starters.
What carb do you have. If it's a quadrajet you may have a linkage adjustment off as mentioned above. When you turn it off, look down the throat with a flashlight. The butterflies should be almost completely closed. |
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03-04-2011, 07:33 PM
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#7 |
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Registered User
Join Date: Feb 2011
Location: aiken sc
Posts: 57
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Re: 350 wont idle down
yeah its quadajet,ill check it
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03-04-2011, 07:37 PM
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#8 |
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Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,190
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Re: 350 wont idle down
Q-jets will do that when the throttle shaft gets worn. Try taking the return spring off the lower part of the bracket & rigging it up so it pulls back from the throttle rod or cable.
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03-04-2011, 08:30 PM
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#9 |
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Account Suspended
Join Date: Oct 2009
Location: Sammamish, WA
Posts: 2,404
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Re: 350 wont idle down
Timing and/or vacuum leak. A little carb cleaner around the edges of the intake will tell you if that's the case...
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