exhaust manifold valve questions

I have recently rebuilt my 364 and noticed that someone cut out the exhaust manifold valve on the passenger side. My automatic choke was not getting enough hot air to open all the way so I installed an electric choke. The electric choke opens before the engine gets hot this causes a rough idle and the motor shuts off if I do not keep the rpms up unitl it reaches operating temp. Also I noticed with the electric choke I there is a strong gas smell coming from the exhaust I have played with the carb and nothing changes. I would just like to know if there is a fix for any of this or do I have to just live with it. Thanks.

 

choke operation.

There are a couple of ways aroud this if you can not find a replacement manifold. As you know, the electric choke will get the car started but as soon as it has power, it opens. You could run a seperate switch inline and toggle the choke off once the engine warms up-but you will not really be able to drive it until you do so. You could put a manual choke cable on it, or if you can find one, they used to sell a device you could clamp to one of the tubes of an exhaust header whick ran up through a tube (like the original) which would send heat up and open the choke as it was designed. I have seen these on many cars but have not seen any for sale for a long time. You could check places that sell headers such as a local speed shop, Summit or Jegs mail order, or J.C. Whitneys.

 

JJ2EE,

I found myself in the exact situation as yourself. So I would just keep my foot on the pedal and let it rev at high RPM for about 2-3 minutes. Eventually I found when I could let off and it would idle smoothly on its own.

Additionally, you can makeyour own choke stove with some copper pipe. It's more malleable than aluminum and you can probably get more/closer bends around the manifold. If you use two pieces, I found it works better.

First piece you can bend so that it fits snug against your psgr-side valve cover. The 2nd piece connects to that and runs down to the exhaust manifold. Wrap that baby around as tight as you can and as many times as you can. Leave the end open so it will draw hot air in and up to the manual choke.

 

Y'all
The problem with the heat risers being removed is they stick ( allways in the closed possition) and crack the manifold so people removed them.

 

Hi Judd,

mine was the exception from the rule, I guess. MAnifold was cracked, too. When I got it off to replace it, the valve was stuck indeed - but being fully opened !!!

o No:
Kindacool

 

Yes they usually set cold and closed and rust in place or the spring falls off and they drop to the closed position. Here in the warm Mississippi climate I just rip out the inner disc, I don't much need cold weather equipment.