I got a 79 chevy q-jet im trying out on my car. It idles good and run good till wot. What i think is happening is I don't believe the secondarys are opening all the way. Theres a lever of some kind keeping the the air valve from opening on secondary side. Im talking about the ones on the bottom of the carb. (My terminology my be wrong). The lever im talking about is located behind the chock at the bottom of the carb. When I open the throttle all the way the T shaped arm on the end of the air valve hangsup on a lever behind the choke. I wish i could explain this better. Anyone know what im talking about? David Riggs
That is called a 'secondary throttle lockout'. When your choke opens up completely, the secondary lockout "tang" disengages, allowing the secondary throttle valves to open fully. This prevents stumbling on acceleration during cold operation. You can disconnect it, but I wouldn't recommend that. See if it works when your motor is fully warmed up. If not, perhaps you have a choke problem. It may be sticking.:Smarty: :3gears:
