Quick Answer: What Component Controls The Timing Of The Spark At Different Engine Speeds?

How much ignition timing is too much?

There is no such thing as too much ignition timing.

The terminology for petrol engines with spark plugs is degrees before top dead centre, or degrees after top dead centre.

So the question comes down to – too much retardation, or too much advance.

Retarded ignition would not enable the engine to achieve maximum rpm..

How do you adjust the timing on a distributor by ear?

Timing by ear simply eliminates the sometimes tedious first step of getting the timing close. When I do mine, I set the idle to about 1500 rpm and rotate the distributor until I get maximum rpm. I then retard it slightly until I get a 100 rpm drop and then take it out for a test drive.

Can timing cause hard start?

Usually, hard starting occurs when the ignition timing is too advanced, not retarded. An overly advanced condition will cause backfire through the carb and overly retarded will cause backfire through the exhaust. If you are not using a timing light, I would recommend that you do so.

Does advancing timing make more power?

Changing the timing value up or down changes the engine speed up or down for the optimum ignition timing. The engine speed operating range affects where the timing is the best. Increasing the timing advance raises the high-end power, reducing the low-end.

Will engine start if timing is off?

What causes ignition timing to be off? When any changes are made to the engine of a car, the ignition timing is adjusted accordingly. If not, you could experience several problems with your engine with improper ignition timing like knocking, hard to start, increase fuel usage, overheating, and reduced power.

How do you adjust the timing on a distributor?

To adjust your timing, all you need to do is turn the distributor housing one direction or the other, depending on whether or not you want to advance or move back the timing. If the rotor turns clockwise, you’ll advance the timing by rotating the distributor counterclockwise, and vice versa.

What is late ignition timing?

Effects of Retarded Timing In a situation where the ignition timing is retarded too far, the plugs ignite the fuel too late, allowing it insufficient time to burn completely. This causes a loss of power and poor fuel economy.

Does advancing timing increase idle?

If the base timing is retarded 5 degrees from spec the engine will become lazy, and harder to start. It will produce less power(torque) off idle and rev slower. Advance timing, and response increases, easier to start, more power(torque) off idle. … Some engines use the vacuum advance to advance timing at idle.

How do I set the ignition timing without a timing light?

to set your base timing without a light, you just turn the motor over in it’s normal direction of rotation until the mark lines up with where you want it.. loosen up the distributor and hook up a spare spark plug to the #1 plug wire.. turn the distributor until it sparks..

What are the symptoms of bad timing?

A broken timing belt could cause a very expensive problemTicking noise coming from the engine. The timing belt is attached by way of a series of pulleys to the engine’s crank and cam shaft. … Engine won’t turn over. … Engine misfires. … Oil leaking from in front of the motor.

What happens if ignition timing is too advanced?

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.

What controls the ignition timing?

The Basics of Ignition Timing. Ignition timing (or spark timing) controls when the spark plug fires during the Compression Stroke. Ignition timing is measured in degrees of crankshaft rotation, before top dead center (BTDC). … The pressure is maximized just as the piston hits top dead center (TDC).

How do you know if your timing is too advanced?

Symptoms of incorrect ignition timing are poor fuel economy, sluggish acceleration, hard starting, backfiring, or “pinging” or “spark knock”. Too little spark advance will cause low power, bad gas mileage, backfiring, and poor performance. Too much advance will cause hard starting and pre-ignition.

Why does the optimum ignition timing change with engine operating conditions?

The timing advance occurs when the ignition occurs earlier in the compression stroke i.e. before the Top Dead Centre (TDC). … However, the timing advance is necessary when the engine operates at full speed. Thus, it allows sufficient time for burning the air-fuel mixture.