borrelemily7

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

oldchevy

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.

kevinkpk

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?

borrelemily7

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

borrelemily7

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?

kevinkpk

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.