Advancing the timing makes the cars engine run faster which would cause more air and more gas to be used. If you are using more gas and air, you are running Richer. It should not make any difference as the ECU controls the fuel mixture.
What causes a engine to run rich?
When a car is running rich, it means the engine is receiving too much fuel and too little air. … If it’s dirty and clogged with debris, air won’t be able to pass through the filter, thereby preventing it from reaching the engine. Fuel injectors stuck in the open position can also cause an engine to run rich.
How do you know if your timing is too advanced?
Clues that the timing is too advanced would be hard cranking, the engine tries to kick back when cranking, rough idle can be caused by too much advance, and detonation is another sign of too much advance.
Can timing affect fuel mixture?
Correctly timed ignition will cause peak cylinder pressures to occur around 12 to 15 degrees after TDC. If the peak cylinder pressure is reached too early, power will be lost as the piston fights to compress the burning air/fuel mixture. Detonation may also occur, which can lead to engine failure.
What does advancing timing do to an engine?
The major benefit to advancing the timing of a vehicle’s ignition is increasing the horsepower of an engine. Advancing the ignition timing helps raise the high-end power while reducing the low end. It also helps get the spark past the ignition delay and run at peak power.
How do I fix my engine running too rich?
Car Running Rich: How To Fix
- Check The Air Duct’s Flap. The flap inside the air duct is an actuator that serves as choke.
- Vacuum Lines And Hoses. Loosely connected or leaked vacuum lines and hoses can cause a vehicle to run rich. …
- Clean The Mass Airflow Sensor. …
- The Oxygen Sensor. …
- Change the spark plugs.
What causes rich fuel?
A faulty oxygen sensor sending the wrong signal to the engine control module can result in a rich fuel condition. Symptoms include black-colored exhaust, fouled spark plugs, and poor engine performance.
Does advancing timing lean or rich?
Will advancing timing make a car run more lean or rich? – Quora. Neither ! Advancing Ignition timing does not effect air/fuel ratio unless it’s extremely late that manifold vacuum pressure drops so low causing the map sensor, metering rods to enrich the fuel mixture.
Is too much timing bad?
Too much timing can cause serious engine damage, so it’s best to be an informed tuner. … If the spark occurs too late, the engine runs flat, makes less power, and may overheat. This discussion will focus on a typical distributor-equipped street engine running pump gas.
What happens if you advance timing too much?
If ignition timing is too far advanced, it will cause the fuel-and-air mixture to ignite too early in the combustion cycle. This can cause the amount of heat generated by the combustion process to increase and lead to overheating of the engine.
Will advanced timing cause overheating?
Too much advanced timing can eventually result in overheating but you would probably notice poor performance, backfires, or pinging before overheating begins – assuming you don’t keep driving under these conditions.
Does advancing timing require more fuel?
When setting the timing for an automobile engine, the factory timing setting can usually be found on a sticker in the engine bay. The ignition timing is also dependent on the load of the engine with more load (larger throttle opening and therefore air:fuel ratio) requiring less advance (the mixture burns faster).
Can ignition timing cause high idle?
The Ignition timing might be in need of adjusting. Ignition problems stemming from the distributor cap, rotor, ignition wires, or spark plugs can cause a high idling issue—each of these components should be examined. If the computerized engine control system is faulty, high idling can be one symptom.
How much HP does 1 degree of timing add?
2-3 hp per degree is a good rule.