Cold Start - looking for some confirmation - The 1947 - Present Chevrolet & GMC Truck Message Board Network

thesmackdown · 06-17-2012, 09:05 AM

I have a 1979 GMC and have always had some trouble with cold starts. But now I can't get it to start at all when cold.

It will start if some gas or starter fluid is added to the carb. I am assuming that means there is something wrong with the carb?

**old Rusty C10** · 06-17-2012, 09:20 AM

if the gas runs, there should be nothing wrong with the gas itself. First thing to do is to check the choke and make sure its properly adjusted. then start looking for other things

tucsonjwt · 06-17-2012, 10:55 AM

Check the choke. Depress accelerator all the way to the floor once. Remove the top of the air cleaner. Is the choke closed all the way? Really closed completely so there is no space at all in the opening? Pull back the throttle bracket and see if you can move the choke valve to close it a bit further. If you have a choke problem, just install an manual choke ($12 fix, works every time, and you know for sure when the choke is closed and when it is open). Note: some think the choke should not work in warm weather, but you still need the choke to close in warm weather - it just opens all the way quickly after the engine starts.

06-17-2012, 09:05 AM	#1
thesmackdown Registered User Join Date: May 2012 Location: Western Wisco Posts: 5	Cold Start - looking for some confirmation I have a 1979 GMC and have always had some trouble with cold starts. But now I can't get it to start at all when cold. It will start if some gas or starter fluid is added to the carb. I am assuming that means there is something wrong with the carb?

06-17-2012, 09:20 AM	#2
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,310	Re: Cold Start - looking for some confirmation if the gas runs, there should be nothing wrong with the gas itself. First thing to do is to check the choke and make sure its properly adjusted. then start looking for other things __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

06-17-2012, 10:55 AM	#3
tucsonjwt Registered User Join Date: Jul 2007 Location: Tucson, AZ Posts: 3,189	Re: Cold Start - looking for some confirmation Check the choke. Depress accelerator all the way to the floor once. Remove the top of the air cleaner. Is the choke closed all the way? Really closed completely so there is no space at all in the opening? Pull back the throttle bracket and see if you can move the choke valve to close it a bit further. If you have a choke problem, just install an manual choke ($12 fix, works every time, and you know for sure when the choke is closed and when it is open). Note: some think the choke should not work in warm weather, but you still need the choke to close in warm weather - it just opens all the way quickly after the engine starts.



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