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10-04-2011, 02:27 PM
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#1 |
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Registered User
Join Date: Feb 2011
Location: Chula Vista, CA
Posts: 34
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Sudden hesitation and rough idle?
I have an 86 chevy c10 with a new drivetrain, well it was new last spring so it has about 20k on it now but all the sudden lately it has started idling really rough when I start it cold and takes a few minutes to sound normal. If I don't wait long enough sometimes it stalls as soon as I shift into gear. It also has been hesitating for the first few miles when I accelerate. I'm not sure if I just need to run Seafoam through it or what! Any suggestions?
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1986 Chevy C10 305 5.0L Work in progress... |
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10-04-2011, 04:24 PM
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#2 |
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Registered User
Join Date: Dec 2010
Location: Pittsburgh, PA
Posts: 1,009
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Re: Sudden hesitation and rough idle?
Play with the choke, seems like that could be a part of it. Electric or manual choke? If it's electric it might not be functioning properly.
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Steve Member of the Foot Pedal Club '83 Chevy K20: 6" Rough Country, 3" Performance Accessories BL, Bushwacker Cutouts, 38x15.50 Mickey Thompson Baja Claws, 350 HP 350 crate engine from Jegs, Turbo 400 
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10-04-2011, 05:48 PM
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#3 |
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Registered User
Join Date: Jul 2008
Location: sayreville nj
Posts: 1,072
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Re: Sudden hesitation and rough idle?
how exactley do you play with electric choke? not sure what its called but a part on mine is sticking. so when i turn on truck, it stays idling high. no kickdown. so for now, i zip tied it...
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10-04-2011, 08:55 PM
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#4 |
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Registered User
Join Date: Dec 2010
Location: Pittsburgh, PA
Posts: 1,009
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Re: Sudden hesitation and rough idle?
I'm not sure how exactly to play with it, but when mine broke I just replaced the electric choke module. It cost about $30 and it solved my problem. What carb are you running?
__________________
Steve Member of the Foot Pedal Club '83 Chevy K20: 6" Rough Country, 3" Performance Accessories BL, Bushwacker Cutouts, 38x15.50 Mickey Thompson Baja Claws, 350 HP 350 crate engine from Jegs, Turbo 400
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10-04-2011, 09:32 PM
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#5 |
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Registered User
Join Date: Jan 2011
Location: Tulsa,Okla
Posts: 590
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Re: Sudden hesitation and rough idle?
Sure it could be the choke, but it also sounds like a vacuum leak. Check the intake bolts, carb bolts, all vacuum lines, etc. That's what I'm guessin.
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10-04-2011, 10:50 PM
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#6 |
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Registered User
Join Date: Feb 2011
Location: Chula Vista, CA
Posts: 34
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Re: Sudden hesitation and rough idle?
It stops doing it after it has been running a few minutes. I ran Seafoam through it today and that stuff made a world of difference even just in the idle, also changed the oil after running the Seafoam through and spotted some wetness underneath so now another thing to try to figure out! Rough few weeks for my truck.
__________________
1986 Chevy C10 305 5.0L Work in progress... |
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10-04-2011, 11:00 PM
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#7 |
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Registered User
Join Date: Dec 2010
Location: sioux city, iowa
Posts: 619
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Re: Sudden hesitation and rough idle?
Find out what DOES work properly and you'll figure out what doesn't work properly.
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