Author Topic: Disabling choke-good idea?  (Read 2584 times)

Offline 62belair

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Disabling choke-good idea?
« on: October 26, 2014, 07:09:24 AM »
Good morning folks, new guy here.

I recently bought a somewhat restored '67 Impala with the 327/275 engine and power glide. Even though the dealer's tech "rebuilt" the carb it not surprisingly still performs very poorly. The accelerator has to be massaged during startup to keep the car running until it's warm, and it still loads up during the warmup period. It's idled up way too high (I suspect to keep the car running) and it's obviously running way too rich by the smell at a stoplight.

My plan is to get a later model Quadrajet per Cliff's recommendations and rebuild it over the winter. Even with the book I'll work slow and it will take me a while. In the meantime, can I just disable the choke completely and hit the accelerator pump a few times and expect the car to crank when cold? I live in Georgia and it won't be driven below freezing temps anyway.

Can anyone tell me how to disable the choke (and fast idle mechanism) the easiest way? I'd appreciate the simplest directions.

By the way, I don't have the number but the Qjet is the original carb that came on the vehicle.

Thanks all.

Offline 62belair

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Re: Disabling choke-good idea?
« Reply #1 on: October 27, 2014, 12:39:06 PM »
I couldn't figure out to edit my post so I thought I'd better add this.

It doesn't seem to be the original carb at all as I was told. The # is 7044202 which would indicate a '74 Chev/GMC truck. It also says it's made by Carter even though it is a Quadrajet.

Offline 429bbf

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Re: Disabling choke-good idea?
« Reply #2 on: October 28, 2014, 08:39:49 PM »
it sounds like your choke pull off is bad.push it in and cover the hole and see if it comes back out. it may have a bleed hole check and cover it before test. just take a screwdriver and turn the high idle screw counter clockwise. if you don't want to do that just unhook the choke lever from the manifold and wire it open.fwiw

Offline Cliff Ruggles

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Re: Disabling choke-good idea?
« Reply #3 on: October 30, 2014, 03:32:11 AM »
A 7042202 would be pretty lean for the application, even if it was correctly rebuilt it wouldn't be too happy on the 1967 327 engine.  It is however a much better carb than the original, but will need to some help to work like it's supposed to in that application.

I would not disable the choke, it needs to work correctly for instant cold starts and fast idle for warm up.

It's also highly unlikely the rebuild was done with good parts.  I'd get on of our kits, I can also spec out tuning parts to install so that carb will work for the application it's being used on.......Cliff