Initialcentrifugal timing is 25 degrees at 2000. A defect in the cooling system can also result in engine ping.
Pinging Detonation Pre Ignition Triumph Rat Motorcycle Forums
Engine pinging at low rpm. Then most likely youre probably experiencing spark knock. Immediately back off the throttle and only use low rpm engine speeds until you can get the engine investigated. As well as if work your engine hard with a load. Overheating or fuel contamination. Most of the time a catalytic converter will clog because of old age. The engine will lug below 1000 rpm but is smooth at anything above that with plenty of guts.
The pinging went away but i wanted to verify the timing numbers anyway. I set initial timing no vac advance at 10 at about 700 rpm. It could also be caused by dirty fuel injectors clogged carb jets or a restricted fuel filter. Engine pinging also refered to as pinking detonation or knocking pinging can be anything from a loud knocking noise to a soft tinkling sound that is emitted from the engine. Carbon deposits around valve. It will restrict engine airflow.
Leading to pinging or knocking. Say your engine is ticking like a time bomb especially in the morning when its cold. You likely have a valve train issue. Engine knocking pinging rattling noise common causes is your engine making an annoying knocking pinging or rattling sound when you accelerate. Today i checkedset the timing using an adjustable timing light and digital tach. Causing the engine to run hotter and lose power.
If an engine has a tendency to ping it usually becomes first audible when operated in the lower rpm range and during acceleration. Pinging is between 1000 1500 where it goes away and only under a light load like up a 15 grade 6 7 degree slopein second. Pinging in an engine is the result of the air and fuel mixture within an engine cylinder igniting incorrectly. Your engine uses intake valves to feed clean air into the cylinders and exhaust valves to kick spent combustion gases out. If your engine is experiencing hesitation or rough idle you may be dealing with a lean fuel condition and will want to make appropriate adjustments or fixes before detonation occurs. Engine ping is the result of abnormally high combustion temperatures.
You may notice a knocking or rattling noise from your engine or a sudden loss of power under full throttle. This may be caused by using gasoline with an insufficient octane rating carbon. The chances are that you are suffering from a condition known as engine knock. The usual cause of engine ping is over advanced ignition timing an inoperative egr system or improper fuel usage. I have done the seafoam thing no difference so i wonder about the carbon on the pistons. Pinging tends to fade away with.
Centrifugal advance comes in at around 950 1000 rpm and is all in by 2000 rpm. As a result a clogged converter is the most common cause of exhaust back pressure buildup. Like driving uphill passing a slowpoke or towing a trailer.
Gallery of Engine Pinging At Low Rpm
