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What else can I help you with?
What is a kocking sound in the engine and go away in a minute or two?
Preignition. If timing correct, you need more octane in your fuel.
What are some of the symptoms of engine knock in a 77 Trans Am other than a knocking sound?
Engine "knock" is preignition or detonation of the air-fuel mixture before the piston is in power stroke position. It is usually caused by a lean fuel mix. So to check for preignition, check your plugs for signs of lean running.
What is a knock sensor for?
It senses preignition or pinging and adjust ignition and sometimes fuel/air to prevent it. Pinging is the sound you get when driving a standard up a hill in to tall of a gear
What a knock sensor for?
It senses preignition or pinging and adjust ignition and sometimes fuel/air to prevent it. Pinging is the sound you get when driving a standard up a hill in to tall of a gear
What makes a 350 spin counterrclock wise?
Preignition.
What is the function of a knock sensor on a 2000 mercury villager?
the knock sensor monitors preignition,spark knock and sends signal to pcm,pcm responds by adjusting ignition timing and fuel timing until knock is gone.
Why is your 1995 ford mustang 5.0 dieseling when you climb a hill?
That's called preignition. Deiseling is when the engine continues to run after the ignition is shut off. Preignition is the fuel igniting before the piston passes top dead center. The noise is the shock of the explosion being transferred down through the connecting rod to the crank, bearings and block. Retard your timing or figure out why else the fuel mix is igniting too soon. Could be a heat dissipation problem. If the head is running hot (low coolant, trapped air, bad head gasket...) the fuel will ignite early. It could be a problem in the automatic spark advance system. Lots of possibilities.
The difference between octane rating and cetane number or rating?
Octane number is the measure of the resistance of gasoline against detonation or preignition of the fuel in the engine. it is measured relative to the mixture of iso octane (2,2,4 trimethylpentane) and n-heptane. A fuel with 100 octane has the same preignition properties as 100% 2,2,4 trimethylpentane.Higher octane fuel has a greater resistance to autoignition under higher combustion pressure and heat. While octane is not a measure of power, higher octane allows more power to be extracted from the fuel by using higher compression andCetane number is the measure of combustion quality of diesel oil or it is the measure of the ignition delay. the higher the cetane number of diesel the shorter the ignition delay, and the greater the fuel quality, and vice versa. A short delay affords more time for diesel fuel to burn completely.Both Cetane Number (CN) and Octane Number, known also as Research Octane Number (RON), are expressions of the autoignition resistance of a fuel. The differences are significant for each fuel type. In diesel fuel, the fuel needs to ignite quickly to provide more time to complete burning. Cetane expresses the speed to autoignite in a diesel engine. Diesels need early ignition since they do not have spark plugs and distributors. A high cetane fuel acts like a timing advance, igniting the fuel during the compression stroke, thereby allowing a more complete burn as the piston gets to the top dead center.Gasoline engines use ignition systems to trigger the combustion process in fuel. The higher Octane Number means the opposite that a high Cetane Number means, but offers the same for performance. In a gasoline engine with higher compression, the ignition system starts combustion before the piston finishes compressing the fuel. A high octane fuel supports even flame propagation under high heat and compression. This means that the fuel burns at a steady rate and speed even under high pressure. Lower octane fuels will predetonate under high heat and pressure conditions. This means that the fuel will have multiple unstable flames. Without a single front, this causes pressure wakes in the combustion chamber, and robs the engine of power. The fuel is consumed in small explosions, like popcorn in a pan, rather than one single explosion pushing the piston. This preigniting popcorn is known as knocking and pinging because of the sound, and is indicative of this loss of power due to combustion instability.High cetane in diesel allows the fuel to start burning early in the compression stroke of a diesel for more performance. Higher cetane means more performance in diesel, since no diesel has no external ignition timing control.High octane in gasoline allows the fuel to resist preignition under high pressure and heat, and allows a steady propagation of a single explosion to push the piston once the fuel is combusted by the ignition system.Cetane and diesel are opposite in what they measure, but the result is the same. High cetane has a low resistance to preignition, while high octane has a high resistance to preignition; both high cetane and high octane provide the ability to extract more power from fuel.
What kind of fuel does a 1994 Harley road king use?
It will run on just about any gasoline 87 octane or higher, but considering the gas mileage motorcycles get it's crazy to try and pinch pennies when it comes to fuel quality. I recommend using the highest octane pump gas available. The higher the octane, the less likely you'll experience preignition or spark knock, especially in warmer climates.
What is knocking noise on 350 Chevy at 30 mph and above after warm up but does not do it at idle?
Sounds like preignition. A higher octane gas might help
What is the difference between a diesel engine and a petrol engine - mixing of the air and fuel?
in the original gasoline (petrol) engine fuel and air were premixed in a carburetor before entering the cylinder through the intake valve, ignition is caused later when the spark plug fires (to prevent high compression high power engines from knocking and thus damaging themselves it was necessary to use only high octane fuel, which typically required adding tetraethyl lead a deadly poison to the fuel)in the diesel engine the fuel is injected into the air filled cylinder at maximum compression and instantly ignites (from the heat of compression)in the modern fuel injected gasoline (petrol) engine fuel is injected into the air filled cylinder just before the spark plug fires (to prevent the chance of knocking (i.e. preignition) because of use of low octane fuel)
What causes car to misfire at high speeds?
The spark timing might be too advanced. At high temperatures and RPM an advanced spark might cause preignition, and engine knock. That's only likely to happen if the engine is modified though. Other than that, check the air and fuel filters are clean, as the harder the engine has to work the more a clean flow of both is important.
