First time help: Vacuum Testing

[kpfoten]

Hi,

I bought a vacuum guage and want to test vacuum on my 2.7. I've never done it before and was wondering how I would go about doing it, where to hook it up, numbers to look for, etc.

Any help would be appreciated.

Thanks

[kpfoten]

Ok. Hooked the guage up to the vacuum hose coming out of the intake to the WUR and the Dizzy. Wasn't getting much of a vacuum at all (just maybe 3-4 in/hg on idle. Sprayed some carb cleaner (!) on the left side of the airbox/intake area and the pressure went up into the 20 in/hg range with increase in idle.

I'm assuming there's a leak, probably in the airbox. When I bought the car it had no pop-off valve. I had since installed one, looking real hard for a crack, but couldn't find one. Somebody said the seam between the upper and lower parts blows out?

Also, a fire started on my SSI, probably due to the caked-in grease. Arrgh!

Any help would be appreciated. Thanks!

[dean]

That is how you test for a leak. You can use other things to test for leaks also. I always use carb cleaner because it is handy. And when you hook up the gauge make sure you are on the intake side of the throttle