This form helps you to search in Choke Pull-offs category.
Type in "Keywords" field name of part, car mark or number of car part.
Select a category or price range if you need.
When the engine is cold the choke valve is fully closed (some may have a small gap). This allows the engine to get that extra fuel it needs to get going. When the engine starts vacuum is applied to the choke pull-off which will retract, opening the choke valve slightly. How much, if any depends on the vehicle, but the bottom line is that the pull-off keeps the choke from closing too much when the vacuum drops down (engine speeds up).
Testing with a vacuum pump Ė Apply 15″ of vacuum to the vacuum line going to the choke pull-off. The pull-off should retract all the way and for at least 20-30 seconds. If the plunger isnít retracted completely, replace the pull-off. Testing with the engine running Ė Your engine should have at least 15″ of vacuum. This would be at idle. Again, if the plunger isnít retracting all of the way, then replace the pull-off.