Oops! I've been driving around with a small vacuum leak since I put the motor in and didn't even know it. For those familiar with Q-jets: I left out the little hose that goes from the carb to the choke pull-off diaphragm. Noticed that missing last night and put it on. It runs better than it did before, but it's surprising how well it ran without it. The biggest improvement is how it runs right after a cold start. Without the pull-off working it was probably loading up and it surged and ran crappy for about 30 seconds after start-up. Now it runs good right from the git-go. I was also able to lean the mixture a little bit and let it idle a little lower, maybe I'll save a little gas now. Idle quality has slightly improved and I think it took care of a slight miss I was noticing. The choke-pull off's other function is to prevent the secondary air valve from opening when the choke is on, but I haven't been getting on it much (especially when it's cold) with the engine break-in so I didn't notice that too much.
1976 Silver/Firethorn. L48, 4spd. Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: email@example.com, 112 LSA, Eagle Steel Crank.
Corvette is a registered trademark of the General Motors Corporation(GM) &
Chevrolet Motor Division. Vette Registries, LLC is responsible for all site content (except for member submitted content or where otherwise
noted) and does not claim or imply that Chevrolet or
GM is responsible for Official C3 Vette Registry content. Vette Registries, LLC is independent from GM and is not affiliated
with, sponsored or supported by GM. Copyright/trademark/sales mark
infringements are not intended, or implied and are in fact used to support
GM, Chevrolet and Corvette.
Official C3 Vette Registry content is Copyright 2001-2018, Vette Registries, LLC. Content may not be reused without written consent. All Rights Reserved. NS
Corvette (Vette) Model Years on this site: 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982