Carb is choking car
Carb is choking car

This picture is what it looks like when it runs great

The thing circled, as i do not know what to call it(what love to know what to call it and what it does), will close up allowing no air into the fuel mixture
So I go and push this lever that opens it up, then my car starts right up, will post pictures, Bare with me on the terms I am new to auto repair
Last edited by Reddeath210; Mar 16, 2011 at 02:50 PM.
Joined: Sep 2007
Posts: 598
Likes: 2
From: Hampton, Virginia
Car: 87 Camaro Z-28
Engine: 305 LG4 w/ E4ME carb
Transmission: 700R4
Axle/Gears: 2.73
Re: Carb is choking car
Have you tried a can of $3 carb cleaner and spraying the outside linkage/parts? it's possible they are sticking.
Re: Carb is choking car
The thing circled in your pic is the choke. It's purpose is to richen the engine for better drivability and cold starts, but ONLY when the engine's cold. If it's staying shut all the time ( untill you manually open it ), it could just be sticky linkage.
Last edited by DoubleV; Mar 17, 2011 at 05:29 PM.
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Joined: Oct 2002
Posts: 9,067
Likes: 1
From: Saskatoon, SK, Canada
Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
Re: Carb is choking car
What you have circled is the choke - the moving plate is called the choke plate.
When the engine is cold, it should be mostly closed (maybe an 1/8" to 1/4" gap on the front and back of the plate to the carb body). The purpose of this is NOT to restrict airflow through the carb when it is cold, but instead it is to help richen up the fuel mixture.
When that plate is closed, it creates a bit of vacuum underneath it, which helps to draw fuel from the main fuel circut as well as the idle circuit, instead of just the idle circuit. The engine needs this extra fuel when its started cold, as well as needing to idle faster than normal (typically set to around 1300-1500rpm) so that it can start and run without stalling and also warm up quickly. Once the engine has a bit of heat in it, that plate should be completely open, as the extra fuel is no longer needed. It should also settle down to a normal idle when you tap the throttle.
When the engine is cold, it should be mostly closed (maybe an 1/8" to 1/4" gap on the front and back of the plate to the carb body). The purpose of this is NOT to restrict airflow through the carb when it is cold, but instead it is to help richen up the fuel mixture.
When that plate is closed, it creates a bit of vacuum underneath it, which helps to draw fuel from the main fuel circut as well as the idle circuit, instead of just the idle circuit. The engine needs this extra fuel when its started cold, as well as needing to idle faster than normal (typically set to around 1300-1500rpm) so that it can start and run without stalling and also warm up quickly. Once the engine has a bit of heat in it, that plate should be completely open, as the extra fuel is no longer needed. It should also settle down to a normal idle when you tap the throttle.
Re: Carb is choking car
When the engine is cold, it should be mostly closed (maybe an 1/8" to 1/4" gap on the front and back of the plate to the carb body). The purpose of this is NOT to restrict airflow through the carb when it is cold, but instead it is to help richen up the fuel mixture.
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Re: Carb is choking car
the choke mech on the side(round thing)could be bad,is the wire hooked up?
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
There should be a single wire plugged into the black round plastic piece with the coiled spring in it - that black round plastic piece is called the "choke thermostat". The wire supplies 12 volts to the "choke thermostat" to warm it up when the engine is running. It takes several minutes of the engine running for it to warm up enough to open the choke plate.
https://www.thirdgen.org/forums/carb...e-rebuild.html , scroll down to the exploded view, part #46. The factory called it the "stat cover" (as in "thermostat" cover). Make sure when you put the thermostat back on that the coil spring properly engages the choke coil lever, #42.
https://www.thirdgen.org/forums/carb...e-rebuild.html , scroll down to the exploded view, part #46. The factory called it the "stat cover" (as in "thermostat" cover). Make sure when you put the thermostat back on that the coil spring properly engages the choke coil lever, #42.
Re: Carb is choking car
The purpose of this is NOT to restrict airflow through the carb when it is cold, but instead it is to help richen up the fuel mixture. When that plate is closed, it creates a bit of vacuum underneath it, which helps to draw fuel from the main fuel circut as well as the idle circuit, instead of just the idle circuit.
Last edited by DoubleV; Mar 17, 2011 at 05:28 PM.
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