Engine noise makes us more nervous than any other automotive sound because noise can mean expense and inconvenience. And, sometimes engine noise is nothing more than a normal dynamic of the engine's ...

Pinging—that sound that resembles pebbles being thrown on a tin roof—has become familiar to all of us as a common occurance with today's low-octane fuel and reduced engine speeds. Call it pinging, ...

CARS.COM — Vehicles affected by service bulletin: The problem: Drivers may note a lit Check Engine light and spark knock on heavy acceleration at warm ambient temperatures. This is due to a software ...

I'm driving a 2006 Ford Focus 2.0Si. It's got a knock in the engine as I'm driving. The more I accelerate, the more the noise in the engine. Do you know what could be the cause? Also note that there ...

I have a 1991 full size 4-wheel 5.7 GMC Jimmy with 131,472 miles on it that has everyone stumped. When I first start it up in the morning it runs rough and wants to stall. After a short time it clears ...

ABSTRACT The compression ratio is a strong lever to increase the efficiency of an internal combustion engine. However, among others, it is limited by the knock resistance of the fuel used. Natural gas ...

ABSTRACT Recently, a tendency is consolidating to produce low displacement turbocharged spark-ignition engines. This design philosophy, known as “engine downsizing”, allows to reduce mechanical and ...

The times they are a-changin’. With apologies to Mr. Dylan, the ignition timing of your 4x4s engine is pretty well set. Ignition timing is what is used to make sure that the distributor fires the ...

Engine noise makes us more nervous than any other automotive sound because noise can mean expense and inconvenience. And, sometimes engine noise is nothing more than a normal dynamic of the engine’s ...