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

bucketofbolts · 07-04-2004, 11:43 PM

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I have just rebuilt my old single bbl Model B Rochester for a 63' Chevy p/u.

Problem is when you try to accelerate. You get hestitation and the a back fire out of the throat of the carb. Truck has been recently timed and new points and condensor put in. What could be the problem now. I do think that the throttle body on the carb is shot. Could this attribute to the popping?

64fleetside · 07-04-2004, 11:48 PM

Did the accelerator pump have a weight & check ball? Last one I messed w/I lost the weight, had a hesitation. Found out it required a weight, added one to solve problem. Brian

bucketofbolts · 07-05-2004, 04:13 AM

I rebuilt it from the ground up. Everything is back where it is supposed to be. Keep with it, eventually I'll get it right.

scottyd · 07-08-2004, 10:33 PM

i could be way off, but back when my 62 had a 235 in it i had a problem kinda like that and it ended up just being a valve out of set ( the old 235 had a solid lifter cam so it didnt take much to make it act up)

bucketofbolts · 07-08-2004, 11:29 PM

I have been told that it could be a sticky valve. I have run and oil change with a quart and a half of diesel through it. Getting better. Maybe I should just consider doing a valve job on it and see if that takes care of it. Thanks for the lead.

bucketofbolts · 07-08-2004, 11:30 PM

I have been told that it could be a sticky valve. I have run and oil change with a quart and a half of diesel through it. Getting better. Maybe I should just consider doing a valve job on it and see if that takes care of it. Thanks for the lead.

07-04-2004, 11:43 PM	#1
bucketofbolts Registered User Join Date: Jul 2004 Posts: 6	Carb Help! [FONT=Comic Sans MS][SIZE=4][COLOR=Red] I have just rebuilt my old single bbl Model B Rochester for a 63' Chevy p/u. Problem is when you try to accelerate. You get hestitation and the a back fire out of the throat of the carb. Truck has been recently timed and new points and condensor put in. What could be the problem now. I do think that the throttle body on the carb is shot. Could this attribute to the popping?

07-05-2004, 04:13 AM	#3
bucketofbolts Registered User Join Date: Jul 2004 Posts: 6	Thanks..... I rebuilt it from the ground up. Everything is back where it is supposed to be. Keep with it, eventually I'll get it right.

07-08-2004, 10:33 PM	#4
scottyd Registered User Join Date: Mar 2004 Location: waco tx Posts: 113	i could be way off, but back when my 62 had a 235 in it i had a problem kinda like that and it ended up just being a valve out of set ( the old 235 had a solid lifter cam so it didnt take much to make it act up) __________________ 1962 chevy shortwide,bagged, notched and Zed frame,top chopped 3 1/2", sectioned 2" tubbed (31x18.5 mickey Ts),shaved,currently 51"s from ground to roof top!

07-08-2004, 11:29 PM	#5
bucketofbolts Registered User Join Date: Jul 2004 Posts: 6	Crab Help. Thanks I have been told that it could be a sticky valve. I have run and oil change with a quart and a half of diesel through it. Getting better. Maybe I should just consider doing a valve job on it and see if that takes care of it. Thanks for the lead.

07-08-2004, 11:30 PM	#6
bucketofbolts Registered User Join Date: Jul 2004 Posts: 6	Carb Help. Thanks I have been told that it could be a sticky valve. I have run and oil change with a quart and a half of diesel through it. Getting better. Maybe I should just consider doing a valve job on it and see if that takes care of it. Thanks for the lead.

07-04-2004, 11:48 PM	#2
64fleetside Registered User Join Date: Apr 2004 Location: arkieland Posts: 1,070	Did the accelerator pump have a weight & check ball? Last one I messed w/I lost the weight, had a hesitation. Found out it required a weight, added one to solve problem. Brian



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