I've habitually been using Chevron 93 octane with a few tanks of 89 here and there. The engine still pings after I turn off the car and lasts for about a minute or so. Anyone know why this is?

 

Your engine can't ping if it's off. You have another issue.

 

Why do I have the feeling we're the only ones on the board right now?

Anyway, you know, those pings that sound like little explosions when you shut the engine off. I heard it underneath the car. They're not that loud...kind of like loud ticking sounds.

 

Yeah, they are little explosions but that shouldn't happen though. If it's underneath your car, it might be metal banging on something.

Ticking noises? My car make a weird ticking noise when the car just shuts off. Sort of like "tick tick tick tick tick wok wok wok" It's normal.

 

the tick tick tick when you shut off is normal as far as I know....

 

Little explosions! After the car's shut down? You guys need to rethink your mods

Sounds like an exhaust shield or something else heated just cooling off. Very common

 

you took the words right outta my mouth

 

After the engine is off it has to be metal cooling off, right? As the metal cools off it makes a ticking/popping noise as the metal contracts. This happens will all cars...

 

oil dripping back into the pan?

Heated metal parts from the frame or chassis contracting as they cool and flexing a little?

I don't think it's engine "pinging" though

 

Exactly slllyod. The exhasut gets very hot, and when you shut the car off, the metal is contracting back to it's normal state. You can acutally hear it clicking when the car is running, that's the metal constantly changing temperature. Don't worry about it.

 

Great, muchos gracias for the replies.