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al's71gmc · 03-27-2006, 12:38 AM

My 71 has similar issues. Mechanic told me I have a vac/air leak in the base of the carb. He offered to install a rebuilt QJ for $650. Nice guy. huh? When he set the timing and idle correct, it wouldn't even run without keeping my right foot on the gas while braking with the left. I've got a rebuilt one to put on now, but in the meantime I had to set the timing waaaaay BTDC to get it to run decent. Only problem with that is it slashed my mpg down to about 7 or 8. But at least I can give it gas and it takes off instead of bogging down. I'm hoping the new carb will improve everything.

03-27-2006, 12:38 AM	#2
al's71gmc 4 eyed fever Join Date: Jul 2005 Location: Eureka, Nevada Posts: 500	Re: need some carb help...I think My 71 has similar issues. Mechanic told me I have a vac/air leak in the base of the carb. He offered to install a rebuilt QJ for $650. Nice guy. huh? When he set the timing and idle correct, it wouldn't even run without keeping my right foot on the gas while braking with the left. I've got a rebuilt one to put on now, but in the meantime I had to set the timing waaaaay BTDC to get it to run decent. Only problem with that is it slashed my mpg down to about 7 or 8. But at least I can give it gas and it takes off instead of bogging down. I'm hoping the new carb will improve everything. __________________ 1971 GMC 2500 4x4 1972 GMC Sierra Grande 1/2 t 4x4-#1 son's truck. Recently completed resto. 4 YO daughter," Daddy, I like your truck better than Mom's." (2000 F350-ranch truck) Smart kid!!