- How do you know if your ignition timing is off?
- Will engine start if timing is off?
- Can timing cause hard start?
- How much ignition timing is too much?
- How do you set ignition timing by ear?
- What happens if ignition timing is too advanced?
- What should timing be at idle?
- What rpm do you set timing at?
- Does advancing timing raise idle?
How do you know if your ignition timing is off?
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..
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.
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.
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 set ignition timing 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.
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 should timing be at idle?
Idle/staging is typically 55 degrees to ignite the cylinders with a rich idle mixture. Launch typically 50-53 degrees adjusted for an optimum power at launch. Sudden drop of the timing to typically 36 degrees, approx.
What rpm do you set timing at?
Rev the engine past the point where your mechanical advance is fully engaged. (Usually, 3,000 – 3,500 rpm will do it.) Watch the timing mark on the harmonic balancer using the timing light. Rotate the distributor until the timing mark lines up at zero with the light.
Does advancing timing raise 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.