Does anyone have a manifold pressure gauge inserted downstream of the throttle in their truck? What type of vacuum are you seeing at WOT once the pressure stabilizes?

 

Could you be more specific?

Some details about your truck might help, too.

 

I'm just looking for info from other people's pre-97 trucks. This isn't for diagnostics so my truck's details don't matter.

 

Sure they do. I'm presuming you have a blower, but you haven't said. Also, different engines/exhaust/bolt-ons will effect the answer.

 

Nope, no blower.

I'm looking for values from stock vehicles (slip-on air filters don't matter that much)

 

I see. You confused me with the thread title and mention of a pressure gauge (pressure is only present in a boosted application). You're looking for manifold vacuum readings. Do you want idle as well, or just sustained WOT?

Engine mods and mileage will affect the results people get, so you might want to make a note of them when compiling your replies.

 

Just sustained WOT.

BTW: I usually work with psia and kpaa so that's why I call it pressure and not vacuum.