When to use vacuum timing advance or mechanical timing advance?
Vacuum timing advance. The second method used to advance (or retard) the ignition timing is called vacuum timing advance. This method is almost always used in addition to mechanical timing advance. It generally increases fuel economy and driveability, particularly at lean mixtures.
How is timing advance dependent on distributor speed?
This type of timing advance is also referred to as centrifugal timing advance. The amount of mechanical advance is dependent solely on the speed at which the distributor is rotating. In a 2-stroke engine, this is the same as engine RPM. In a 4-stroke engine, this is half the engine RPM.
When to go to the Mechanic about a bad timing chain?
If the belt is jumping because it’s gotten loose, it can also flail around and damage other parts of the engine. If your engine won’t start or starts driving rough, indicating it may be on its way to failing, contact a certified mechanic for inspection and repairs. 4. Check Engine Light is on
What happens when ignition timing becomes too advanced?
This results in lost power, overheating tendencies, high emissions, and unburned fuel. The ignition timing will need to become increasingly advanced (relative to TDC) as the engine speed increases so that the air-fuel mixture has the correct amount of time to fully burn.
Vacuum timing advance. The second method used to advance (or retard) the ignition timing is called vacuum timing advance. This method is almost always used in addition to mechanical timing advance. It generally increases fuel economy and driveability, particularly at lean mixtures.
This type of timing advance is also referred to as centrifugal timing advance. The amount of mechanical advance is dependent solely on the speed at which the distributor is rotating. In a 2-stroke engine, this is the same as engine RPM. In a 4-stroke engine, this is half the engine RPM.
This results in lost power, overheating tendencies, high emissions, and unburned fuel. The ignition timing will need to become increasingly advanced (relative to TDC) as the engine speed increases so that the air-fuel mixture has the correct amount of time to fully burn.
How does a centrifugal timing advance affect engine speed?
Weights and springs inside the distributor rotate and affect the timing advance according to engine speed by altering the angular position of the timing sensor shaft with respect to the actual engine position. This type of timing advance is also referred to as centrifugal timing advance.