"Martin Baxter" wrote
| In a diesel?
|
| Yes

Even I know diesels don't have spark plugs. But diesels squash the air so hard
it gets hot. It gets so hot the diesel fuel that's squirted in from the injector catches
on fire and burns. It doesn't really explode. It just burns faster than gasoline. It only
burns along the sides towards the middle because there's no air in the middle of the
fuel. That's why diesels make that rattling noise.

Cheers,
Ellen