Electric Choke

[Danny Vrachan]

does any one know if the choke needs the heat hose from the exhaust manifold to work properly

[Jeff A.]

Re: Electric Choke

I have a C3 350 with a Holley Carb. It was just rebuilt and there are 2 wires going to the choke cover which operate a spring inside which opens the choke. There are also vacuum hoses that come in below and operate the vacuum advance. Hope this helps.

[Wayne K.]

Re: Electric Choke

Danny,

An electric choke does use heat from the exhaust manifold to function properly.

Wayne

[Don H.]

Re: Electric Choke

You didn't say what year you are working with. On a Mid-year 64-65 300/327 it uses the tube from the manifold to heat the choke coil. I have seen electric conversions to replace these. So to answer your question, you are talking about two different types of choke: GM mid 60's original uses manifold heat tube - no wire used or an electric (possibly correct for newer years, I am not sure beyond '65) that would need a wire. Don H.

[John H.]

Re: Electric Choke

You don't mention what year or engine you're talking about, but Corvettes didn't use electric chokes - I'll assume you have an aftermarket replacement carburetor with an electric choke (like a Holley 1850). Electric chokes just have an ignition-switched 12V and a ground connection, and don't use any sort of heat tube from the exhaust manifold (although the original carb did, up through 1965). 1966 and later used a manifold-mounted thermostatic coil with a rod to the choke linkage and didn't use a heat tube either.

[Danny Vrachan]

Re: Electric Choke

I have a 1980 corvette. I was wondering how the choke senses the change in engine temerature in order to adjust to keep the engine running and idleing properly.

[John H.]

Re: Electric Choke

Danny -

Dunno about Q-Jets after the mid-70's; maybe someone more familiar with the 1980 Q-Jets will chime in.