I have a 1978 Chevy C10. It has a straight 6 motor and it is a manual transmission 3 on the tree. I purchased a brand new carburetor. However the truck revs really high when I start it. And will not idle it dies. If my foot's not on the clutch and giving it gas it dies. I'm thinking it might be a vacuum hose problem but I'm having trouble finding a schematic. I'm not sure if my truck has an oxygen sensor. The carburator has been adjusted multiple times. It runs really rich when it is running. Please help! I'm on foot until I can get my truck fixed

 

Welcome from Florida. You do not have an oxygen sensor and your problem sounds like it might be your choke sticking although you might have a vacuum leak as well.

 

Vacuum leak would do it, and since you replaced the carb, look there, also I assume this is a 2 barrel, have you installed a carb before? It is possible you over tightened the base gasket. With that I am also going to assume the gasket you used is thin, not like a 1/4" thick?

 

Thank you. I will see about the gasket and how tight it is.

 

I used the gasket that came in the box with the carb. What is too tight for the base gasket? How thick/thin should it be?

 

First I posted as this being a 2 bl carb, is it a single? You can sray WD-40 with it running around the base of the carb, if you have a vacuum leak in that area, the rpm's will increase.