Thread: sbc running rough
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01-09-2007 09:51 AM #1
sbc running rough
I have a 68 350 i'm running in my truck.I had tbi on it and run little rough becuz of the aftermarket cam i had in it.So i put a carb on it and now it runs rough all the time.
it has a 600 cfm 4bbl carb. hei dis. It idle ok little rough but as soon as i open it up it starts to fall on its face.it sounds likes it only running on 7 cly when i give it gas.Put it in gear and die's.It has spark knock if i give it gas whlie it is in gear.
I adjust all the lifters when i put the new intake on with the carb.
I try a diff dis and run the same.When i check the timing with the light the pointer is off by about 15* it is not were itshould be and i think it is from the blanace being newer. My vac is about 15 low but needle is satying still.
I hope some one can help.I have never had so much trouble before
Welcome to CHR. I think that you need to hook up your vacuum advance. At part throttle when cruising you have less air and fuel in each cylinder, and the air-fuel mixture is not as densely packed...
MSD 8360 distributor vacuum advance