Re: Q-Jet question with pic
The Q-Jet you have is known as divorced choke. there should be a coil mounted to your intake with a rod to activate the choke. unfortunately you have an intake for a hot air choke.
It starts easier with the screw in the side because your choke is not operating properly. also the secondaries will not open unless the choke is fully released so the choke mechanism may not be allowing this.
I can suggest several options.
1. Change to the proper intake and connect the proper choke coil and rod.
2. Change the carb a newer style Q-Jet with an electric choke. (my preferered option)
3. Tie the choke fully open and pulling the fast idle cam to fully released. also make sure the choke pull off vacuum actuator is operating properly.
you will not have a choke but you can pump the gas a few times if necessary to start.