Help!!!!carb problems - The 1947 - Present Chevrolet & GMC Truck Message Board Network

RED72blazer · 11-28-2002, 07:46 PM

Well, my dad just bought a 76 suburban, it's got a 454, and it's all stock with just over 95,000. The only big problem was the carburator, whenever you punched it, the carb would bog down and then accelerate. The choke was also alittle finiky I spent the last two days rebiulding it and got it on the truck today it started right up and ran really good,except for the gas coming out of the filter fitting, after I tightened that it started, I let it run up to temp and I shut it off and it diesaled just a little bit. I put the air cleaner on it and tried to start it but it was flooded. I let it sit for awile, it would almost start,but not quite. I let it sit a little longer and it fired right up. I decide to go for a spin and it ran pretty damn good, no bog, but it felt like the secondaries didn't open. i went back home and shut it off and it diesaled for really long, I hit the key and it started agian(while deisaling), I hopped out, took off the air cleaner and turned it off again, it diesaled again for about 10 seconds and then two geysers of fuel came out of the carburator. What's going on here? Do I need to rebuid it again? Will the edelbrock Off my truck fit it? What about the stock carb on a 80 suburban 350? Or the stock carb off My 72 blazer? also the choke tubes broke off at manifold, happy thanksgiving.

**fine69** · 11-28-2002, 09:47 PM

Sounds like your float level is too high. Fuel is spilling out of the bowl.
Yes your Edelbrock will bolt on, get an adaptor at most any autostore.

Hooter · 11-28-2002, 10:27 PM

Float is way too high. I hate rochesters. I would go with a carter afb myself

dashadow · 11-29-2002, 02:15 AM

Ditto on float level. My experience with Rochester is they are either really good or really bad. No middle ground.

RED72blazer · 11-29-2002, 03:01 AM

how should I check if the float level is too High? Can I change it? If I put the edelbrock on there what about all the hoses and smog crap? can I take it off? thanks for all the help

matt

Hooter · 11-29-2002, 03:33 AM

get rid of all the smog crap. Just have the line going from the vac advance to one of the vacum ports on the edelbrock. I cant remember how to check the float level (Im tired) Ill remember tommorow if someone else doesnt tell ya

11-28-2002, 07:46 PM	#1
RED72blazer urban fourwheelin Join Date: Aug 2002 Location: Seattle Posts: 1,007	Help!!!!carb problems Well, my dad just bought a 76 suburban, it's got a 454, and it's all stock with just over 95,000. The only big problem was the carburator, whenever you punched it, the carb would bog down and then accelerate. The choke was also alittle finiky I spent the last two days rebiulding it and got it on the truck today it started right up and ran really good,except for the gas coming out of the filter fitting, after I tightened that it started, I let it run up to temp and I shut it off and it diesaled just a little bit. I put the air cleaner on it and tried to start it but it was flooded. I let it sit for awile, it would almost start,but not quite. I let it sit a little longer and it fired right up. I decide to go for a spin and it ran pretty damn good, no bog, but it felt like the secondaries didn't open. i went back home and shut it off and it diesaled for really long, I hit the key and it started agian(while deisaling), I hopped out, took off the air cleaner and turned it off again, it diesaled again for about 10 seconds and then two geysers of fuel came out of the carburator. What's going on here? Do I need to rebuid it again? Will the edelbrock Off my truck fit it? What about the stock carb on a 80 suburban 350? Or the stock carb off My 72 blazer? also the choke tubes broke off at manifold, happy thanksgiving.

11-28-2002, 09:47 PM	#2
fine69 Senior Member Join Date: Dec 1999 Location: Urbana,Ohio,USA Posts: 4,618	Sounds like your float level is too high. Fuel is spilling out of the bowl. Yes your Edelbrock will bolt on, get an adaptor at most any autostore. __________________ 2008 Chevy HHR 1/2 panel. 1949 Chevy Panel truck(just sittin, waiting) Board member #6

11-28-2002, 10:27 PM	#3
Hooter My other Love Join Date: Aug 2001 Location: Castlegar B.C. Canada Posts: 4,085	Float is way too high. I hate rochesters. I would go with a carter afb myself __________________ Castlegar B.C.The great white North (Canada Eh!) Hooter_5@hotmail.com First generation Monte Carlo club pictures of my life

11-29-2002, 02:15 AM	#4
dashadow Registered User Join Date: Oct 2002 Location: Alabama Posts: 90	Ditto on float level. My experience with Rochester is they are either really good or really bad. No middle ground. __________________ '71; 250; 3 on a tree GMC

11-29-2002, 03:33 AM	#6
Hooter My other Love Join Date: Aug 2001 Location: Castlegar B.C. Canada Posts: 4,085	get rid of all the smog crap. Just have the line going from the vac advance to one of the vacum ports on the edelbrock. I cant remember how to check the float level (Im tired) Ill remember tommorow if someone else doesnt tell ya __________________ Castlegar B.C.The great white North (Canada Eh!) Hooter_5@hotmail.com First generation Monte Carlo club pictures of my life

11-29-2002, 03:01 AM	#5
RED72blazer urban fourwheelin Join Date: Aug 2002 Location: Seattle Posts: 1,007	how should I check if the float level is too High? Can I change it? If I put the edelbrock on there what about all the hoses and smog crap? can I take it off? thanks for all the help matt



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