Q: I have a 2002 Jeep Grand Cherokee with a 4.7-liter, eight-cylinder engine and 69,000 miles on the odometer. At speeds above 70 miles per hour under load, the engine starts pinging. For most local ...

I have a 1985 Camry that has been a terrific car for me thus far. It's "pinged" for as long as I can remember, and a co-worker suggested that I should try a tank of higher-octane gas. Well this ...

Senior Editor Mike Allen answers readers' car questions. Q: I backed my truck in to a white steel post (right rear quarter panel). It didnt really dent or scratch the truck, but it left about a foot ...

Within the Pontiac community, there are many who are very good at physically working on their cars. Changing parts, swinging motors, and the like comes very naturally to them. But when chasing a ...

The demon of engine knock is something an owner of a traditional high-performance Pontiac knows all too well. An engine designed when 102-octane high test was at almost every fuel station in the ...

Engine knocking, or detonation, occurs when fuel in the cylinders ignites unevenly, causing metallic pinging sounds, reduced power, and potential engine damage. Key causes include low-octane fuel, ...

I recently got asked about what "pinging" is, and what the difference is between pre-ignition and detonation, what causes it, and why it is bad for an engine. Basically, both pre-ignition and ...