Do I need a choke?

DemonSwede said
Hey guys! After having installed a new intake (RPM AirGap) this winter my 340 is really difficult to start when cold. It’s an almost stock engine but slightly cammed. It has a Holley 750 DP without choke on it now and I’ve never had any issues doing cold starts before I changed the intake. Now I need to crank it for like 30 secs for it to start and it runs really poorly until it warms up. Once warm it starts and runs good! It has the stock mopar electronic ignition with the blue box.

Do you think the new intake requires a choked carb? If so, would I be better of getting a new carb or try to retrofit a choke to my existing carb?

I’m also thinking of upgrading the ignition this winter to a HEI or other digital setup, do you think an ignition upgrade would help solve the cold start issue without adding a choke?

Thanks!

View attachment 1716134544

View attachment 1716134545

View attachment 1716134546

View attachment 1716134547
Click to expand...
Did you make any other changes when you installed the new intake? Just changing the intake should not cause this. When the engine is dead cold, look into the carb as you are opening and closing the throttle. Do you see a steady stream of fuel? Did you set the timing back to where you started before changing the intake?