Question for Ford guys.

51 Styline · Niagara Falls Member

Question for Ford guys.

Slim · Hydraulic Service Dundas On

Somewhere between 15 and 22 . If its in good shape I would expect higher then 18. . late valve timing .... vacuum leak ..... I think I would plug off the new booster first to see what happens ? This may be of help

http://www.secondchancegarage.com/public/186.cfm

Just looked at my snap on gauge and it throws in carb adjustment also between 10 and 17

Supernash · Fullarton On

My stuff says it should be 18 to 22.
11 would tell me late timing or intake leak/ bad head gasket.

Does your gauge bounce around or slowly drop ? or is this a constant 11 no matter what ?

Supernash · Fullarton On

Sorry Slim. We must have posted at the same time'ish.

33 guy · Mississauga On Rod-side Member Ford guy

I would suspect somrthing wrong with the booster .Check engine vaccum on its own .sbould read around 17, 18 pounds.i would check the rod from the pedal to the booster under the dash to be sure it has proper clearance.

My 66 mercury 390 with a hot cam and tri power the most vacumm I can get from it is about 18.5 pounds and I set the timing to 17.5 pounds.

Start by checking to engine on its own .