Hard to start - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

HomerJ · 01-02-2009, 09:52 AM

1969 K/10,

You say it has a hard time starting - what are the symptoms? Do you have to give it gas, does it sputter, backfire, etc?

1969 k/10 · 01-02-2009, 10:01 PM

Quote:

Originally Posted by HomerJ

1969 K/10,

You say it has a hard time starting - what are the symptoms? Do you have to give it gas, does it sputter, backfire, etc?

Pump it and start cranking. it doesn't even fire until a good amount of cranking.
Usually it is one hit and its started, but when its warm, it struggles to light.

HomerJ · 01-03-2009, 08:05 AM

Quote:

Originally Posted by 1969 k/10

Pump it and start cranking. it doesn't even fire until a good amount of cranking.
Usually it is one hit and its started, but when its warm, it struggles to light.

You pump it when it's warm? If that's what you're saying, try NOT pumping it after it's warm - you may be flooding it.

HomerJ

Irishpilot · 01-03-2009, 08:26 AM

I went through the same problems with my 10.6:1 406. I likes a lot of advance and has longtubes, so what fixed my problem was getting a good heat shield and then getting a 900amp cold cranking battery. The new battery helps turn the truck after the compression has built up. The truck starts immediately.

If your truck is warm and it starts but kind off sounds like it is lean/stumbling then it is a choke issue.

Tmiller · 01-03-2009, 09:14 AM

Carb could be heat soakin too. May need a good phenolic carb spacer.
May want to check the mechanical/vacume advance too and make sure they're not sticking.

1969 k/10 · 01-09-2009, 12:33 AM

Quote:

Originally Posted by Tmiller

Carb could be heat soakin too. May need a good phenolic carb spacer.
May want to check the mechanical/vacume advance too and make sure they're not sticking.

Its pretty cold out to be heat soaking.
I still have no idea whats going on. I'm starting to blame the edeljunk carb.

Tmiller · 01-09-2009, 08:33 AM

Yup I had an edlebrock once, only once. They never seem to tune out.
What process did you use for the idle air mixture, I found by mesuring vacume seemed to make it run the best. Hey just remembered, pull those mixture screws and clean them and their seats out good, I remember having to do that frequently to keep it idling right.

1969 k/10 · 01-11-2009, 11:23 PM

Ya i'm not to good at getting this carb. in tune.

kcjones · 01-12-2009, 01:54 PM

Quote:

Originally Posted by 1969 k/10

Ya i'm not to good at getting this carb. in tune.

Hey K10: bring your truck to the meet this Saturday, and I'm sure between all the guys there we can get that thing singin'!

NorCal Mini-Meet

01-02-2009, 09:52 AM	#26
HomerJ Registered User Join Date: Apr 2007 Location: Norman, OK Posts: 222	Re: Hard to start 1969 K/10, You say it has a hard time starting - what are the symptoms? Do you have to give it gas, does it sputter, backfire, etc? __________________ 67 C-10 LWB "Cow-butt-spotted" (neighbor's term) - work in progress. 350/TH400/3.73 67 Chevelle SS Clone 454/TH400/3.73

01-03-2009, 08:26 AM	#29
Irishpilot Registered User Join Date: Jul 2006 Location: Kunsan AB, South Korea Posts: 187	Re: Hard to start I went through the same problems with my 10.6:1 406. I likes a lot of advance and has longtubes, so what fixed my problem was getting a good heat shield and then getting a 900amp cold cranking battery. The new battery helps turn the truck after the compression has built up. The truck starts immediately. If your truck is warm and it starts but kind off sounds like it is lean/stumbling then it is a choke issue. __________________ 1971 C-10, 406ci, restoration begun! 406ci sb; zero decked, bored .030, edelbrock aluminum e-tec heads, edelbrock performer RPM intake, comp 268 cam, comp 1.6 pro-magnum roller rockers, MSD street fire HEI, MSD 8.5mm wires, Holley Street demon 770, Hedman LT headers. 10.6:1 compression, Air Ride Tech bags on all 4-corners.

01-03-2009, 09:14 AM	#30
Tmiller slims 68 Join Date: Apr 2007 Location: Marshall Mi Posts: 55	Re: Hard to start Carb could be heat soakin too. May need a good phenolic carb spacer. May want to check the mechanical/vacume advance too and make sure they're not sticking. __________________ 68 c10 LWB, blown 454 , 550 hp & 600 tq est. 06 Chevy Cobalt SS supercharged 2.0L 08 Chevy silverado crew cab 1/2 ton 2wd 5.3L, she wont let me put a supercharger on it. Last edited by Tmiller; 01-03-2009 at 09:18 AM.

01-09-2009, 08:33 AM	#32
Tmiller slims 68 Join Date: Apr 2007 Location: Marshall Mi Posts: 55	Re: Hard to start Yup I had an edlebrock once, only once. They never seem to tune out. What process did you use for the idle air mixture, I found by mesuring vacume seemed to make it run the best. Hey just remembered, pull those mixture screws and clean them and their seats out good, I remember having to do that frequently to keep it idling right. __________________ 68 c10 LWB, blown 454 , 550 hp & 600 tq est. 06 Chevy Cobalt SS supercharged 2.0L 08 Chevy silverado crew cab 1/2 ton 2wd 5.3L, she wont let me put a supercharger on it. Last edited by Tmiller; 01-09-2009 at 08:34 AM.

01-11-2009, 11:23 PM	#33
1969 k/10 Registered User Join Date: Jun 2008 Location: Santa Rosa, California Posts: 102	Re: Hard to start Ya i'm not to good at getting this carb. in tune. __________________ 1969 red k/10 with sb350 4.11 gear ratio, front disk, 3 speed automatic



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