1972 C10 hard starting after setting - The 1947 - Present Chevrolet & GMC Truck Message Board Network

wabash15 · 08-25-2013, 12:29 PM

I have a 1972 c10 with 350 and original carb. When started everyday it starts fine. If it sets more than @ 2 days I have to pump the accelerator 20-30 times to get it to start. Thetruck had set since 1984 befor I restored it. Had the card rebuilt in the process. Once started it runs great. Put a new mechanical fuel pump on during the restoration. Getting frustrated as it sets for weeks at a time.
Ideas?

mmiddle · 08-25-2013, 04:53 PM

If it is a Qjet.... Then the secondary metering wells are leaking. Very common problem. several kit manufacturers make a (semi) fix for this it is new aluminum plugs that replace the old ones and a sponge to ???help sop up the gas???? Use JB weld thinly over all 4 metering well plugs. That should fix it.

What is happening is over a several days the float bowl drains into the intake. Your cranking and cranking is refilling the float bowl.

**WIDESIDE72** · 08-25-2013, 09:02 PM

X2 also be sure you have gas at the carb. I recently had a fuel pump go bad after sitting for about a year. It only ran for about 1 hr total before that. I have heard that the thanol in gas ruins the diaphragm. (?)
Posted via Mobile Device

swamp rat · 08-25-2013, 09:24 PM

I had that problem until i replaced my fuel pump too, starts a lot easier now. I also rebuilt my Edelbrock carb and found i had some linkage adjustments that were out.also.

luvbowties · 08-25-2013, 11:41 PM

Make sure your choke is closing completely for those cold, delayed-for-days starts.
Sam

**Tom Vogel** · 08-26-2013, 08:37 AM

Post #2 and 3 have your answer for you, its those little plugs. They are leaking and need to be replaced. The gas in your carb is leaking out there and dripping into your intake manifold. You have then got to crank that motor until the carb fills back up with gas enough to feed the motor. Easy fix.

**Ironangel** · 08-26-2013, 10:25 AM

Apply's to the Rochester 2bbl's as well...No biggie. A normally aspirated (carbureted) motor with mechanical fuel pumps will do that after sitting a couple of days...

wabash15 · 08-26-2013, 02:15 PM

OK - what do I do to fix them? I am not carb savy....

NC_John · 08-26-2013, 08:33 PM

Quote:

Originally Posted by wabash15

OK - what do I do to fix them? I am not carb savy....

Look here!

http://quadrajetparts.com/rochester-...h-t-12_21.html

08-25-2013, 12:29 PM	#1
wabash15 Registered User Join Date: Sep 2009 Location: Orrville, Ohio Posts: 77	1972 C10 hard starting after setting I have a 1972 c10 with 350 and original carb. When started everyday it starts fine. If it sets more than @ 2 days I have to pump the accelerator 20-30 times to get it to start. Thetruck had set since 1984 befor I restored it. Had the card rebuilt in the process. Once started it runs great. Put a new mechanical fuel pump on during the restoration. Getting frustrated as it sets for weeks at a time. Ideas?

08-25-2013, 09:02 PM	#3
WIDESIDE72 Senior Member Join Date: Aug 2008 Location: Cedar Park, Texas Posts: 7,500	Re: 1972 C10 hard starting after setting X2 also be sure you have gas at the carb. I recently had a fuel pump go bad after sitting for about a year. It only ran for about 1 hr total before that. I have heard that the thanol in gas ruins the diaphragm. (?) Posted via Mobile Device

08-25-2013, 09:24 PM	#4
swamp rat Registered User Join Date: Oct 2007 Location: Spanaway Posts: 8,451	Re: 1972 C10 hard starting after setting I had that problem until i replaced my fuel pump too, starts a lot easier now. I also rebuilt my Edelbrock carb and found i had some linkage adjustments that were out.also. __________________ Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's

08-25-2013, 11:41 PM	#5
luvbowties Registered User Join Date: Feb 2009 Location: southeasternfoothillsofusa Posts: 1,557	Re: 1972 C10 hard starting after setting Make sure your choke is closing completely for those cold, delayed-for-days starts. Sam

08-26-2013, 08:37 AM	#6
Tom Vogel 2WD Jimmy Join Date: Mar 2005 Location: Davis County, Utah Posts: 2,565	Re: 1972 C10 hard starting after setting Post #2 and 3 have your answer for you, its those little plugs. They are leaking and need to be replaced. The gas in your carb is leaking out there and dripping into your intake manifold. You have then got to crank that motor until the carb fills back up with gas enough to feed the motor. Easy fix.

08-25-2013, 04:53 PM	#2
mmiddle Registered User Join Date: Jul 2013 Location: Forestburg, Texas Posts: 659	Re: 1972 C10 hard starting after setting If it is a Qjet.... Then the secondary metering wells are leaking. Very common problem. several kit manufacturers make a (semi) fix for this it is new aluminum plugs that replace the old ones and a sponge to ???help sop up the gas???? Use JB weld thinly over all 4 metering well plugs. That should fix it. What is happening is over a several days the float bowl drains into the intake. Your cranking and cranking is refilling the float bowl. __________________ Mark Jesus is the Way! 2003 2500HD CCLB Duramax/Ali (Clifford) 2014 2SS/RS black on black Camaro (Betty) 2006 Pontiac SOLSTICE silver/black (Lula-Bell) 1970 C/10 Short Wide (Peggy) 1964 C/10 Short Step (Hambone) RIP Jimmy Hamilton Thank you for the trucks

08-26-2013, 10:25 AM	#7
Ironangel Senior Member Join Date: Feb 2010 Location: Falls City, Nebraska "100 Miles From Nowhere" Posts: 2,219	Re: 1972 C10 hard starting after setting Apply's to the Rochester 2bbl's as well...No biggie. A normally aspirated (carbureted) motor with mechanical fuel pumps will do that after sitting a couple of days... __________________ Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property" "Be American, Buy American"

08-26-2013, 02:15 PM	#8
wabash15 Registered User Join Date: Sep 2009 Location: Orrville, Ohio Posts: 77	Re: 1972 C10 hard starting after setting OK - what do I do to fix them? I am not carb savy....



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