measuring vacuum inHg from the intake manifold of a diesel engine

I would like to know if there is any diagnostic use to measuring the vacuum pressure from the intake manifold of a "diesel" engine as compared to a petrol engine. I'm guessing,diesels use an external power source to generate vacuum in the brake booster(vacuum pump powered by the alternator shaft?).

[I][COLOR=#b22222]my question relates to whether there is [U][B]any[/B][/U] vacuum generated in a diesel engine and whether one could arrive at the same conclusions of diagnostic checks(cylinder firing/a piston ring leak/etc) as with petrol SI engines by using a vacuum gauge?[/COLOR][/I]

Marella, gotta ask, how old are you?

>> generate vacuum in the brake booster(alternator?).

Maybe on the Star Ship Enterpise, but Diesel engines? Hmmmm.

i edited my post,felt the first was too immature.