How to Test Your Vehicle's Carburetor Choke

  • 1-2 hours
  • Intermediate
  • 10-15
What You'll Need
Solvent spray

The carburetor choke on your car needs to work properly. It dictates how much air enters the mixture. When the car is cold it requires a different amount of air to when the vehicle is warm and running. Over time parts will wear in the choke and need to be replaced. The first step is to check how well the carburetor choke works. This is a simple job.

Step 1 - Preparation

You should check the carburetor choke when the engine is cold. Lift the hood and remove the air cleaner to observe the choke. Have a friend sit in the car and tap the gas pedal lightly, just once. With this you should see the choke plate fully close. If it fails to do so, spray the shaft and linkage with solvent spray until they move freely.

Step 2 - Opening Up

The carburetor choke plate is held in place by screws. Remove these and then take out the spring housing. You might spot carbon deposits within the housing. If so, you’ll need to replace the housing gasket. The might also be exhaust leaks in the heat tube. If so, you will need to replace the tube.