Edelbrock 1406 carb

[rich weyand]

Is the choke plate supposed to be wide open when you start the engine up? It sounds like I have the pedal stomped to the floor immediately after I start the truck, and the choke plate is wide open

Yes choke plate should be fully open when you start the engine cold and should slowly close as the engine warms up.

Backwards.

[rich weyand]

So why does my engine idle at like 4000 rpm when I start it? I've done a lot of work on the engine over the past few weeks, I deleted the EGR and  AIR pump, added headers new exhaust system, new carb, I'm not sure where I screwed up putting it back together.

The new carb needs to be adjusted.  In particular, you need to adjust the idle speed.

[dar06003]

Is the choke plate supposed to be wide open when you start the engine up? It sounds like I have the pedal stomped to the floor immediately after I start the truck, and the choke plate is wide open

Yes choke plate should be fully open when you start the engine cold and should slowly close as the engine warms up.

Backwards.

So choke plate starts closed, then opens up as the engine warms?


Sent from my iPhone using Tapatalk

[boulky12]

Is the choke plate supposed to be wide open when you start the engine up? It sounds like I have the pedal stomped to the floor immediately after I start the truck, and the choke plate is wide open

Yes choke plate should be fully open when you start the engine cold and should slowly close as the engine warms up.

Backwards.

So choke plate starts closed, then opens up as the engine warms?


Sent from my iPhone using Tapatalk

Oh yeah its like this. My bad

Sent from my SAMSUNG-SGH-I337 using Tapatalk

[Flyinhillbilly]

If you didn't swap the intake to a square bore, or put a spread bore to square bore adapter on it, then you're most likely sucking air around the wide spot where the spread bore pattern meets the square bore carb. Been there myself.

[dar06003]

Thanks for the responses everyone! I used the manifold adapter from auto zone. I'm going to try to adjust the fast idle screw, which affects idle speed when the choke is active. I'll see what happens and update


Sent from my iPhone using Tapatalk

[dar06003]

Fast idle screw took care of it, sounds great at idle now! I just thought it was weird that the fast idle would be set so high right out of the box, you never see that in the instructional videos haha


Sent from my iPhone using Tapatalk

[79 Royal Sierra]

I just sold my hot rod that had a well built roller 350 and it ran better with the 1406 then with a Holley 3310 and it had over 400hp. On my 79 c15 I am going to try to stick with the quadrajet as it runs fine. Going the simpler stock route this time, Lol. Good luck with project and glad you got her running bud.