vacuum testing on a 300?
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Postmaster
Joined: Sep 2008
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From: raymond alberta
vacuum testing on a 300?
anyone know a simple easy way to test for vacuum leaks? is there any way to pressure test the system like you would a coolant or air system?
im trying to find stuff to fix on my 300 that would help the fuel mileage/power output and i am not very familiar with vacuum systems
thanks guys i love learning new stuff about my truck...
im trying to find stuff to fix on my 300 that would help the fuel mileage/power output and i am not very familiar with vacuum systems
thanks guys i love learning new stuff about my truck...
Posting Guru
Joined: Jan 2001
Posts: 2,357
Likes: 3
From: S. Mississippi
You could always try spraying carb cleaner around the intake manifold and the vac lines to see if it idles up. Also i think a vacuum gauge would show that you have low vac due to leaks.
If you have a Harbor Freight around, a decent gauge is about $15. Just bought one a while back myself.
If you have a Harbor Freight around, a decent gauge is about $15. Just bought one a while back myself.
FTE Legend
Joined: May 2008
Posts: 56,542
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From: In my own world
hook up a vaccume guage. if needle wavers back and fort about 1lb, you have a vaccume leak. steady needle no leak. find the leak by spraying brakeclean on all surfaces, if idle rises, you found your leak
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Postmaster
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From: raymond alberta
yeah i did the wires plugs and timing but i will do all that stuff again just because i can and im bored, full out tune up/ rebuild in the works. thanks again
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Post Fiend
Joined: Jan 2007
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From: Almost Heaven
I hate to sound redundant because I'm known as the "exhaust" man, but I know your 300 has well over 200K miles..Have your cats ever been replaced? If not, I would put a three-way cat on the list. You will gain a few horse, nothing impressive, but your butt dyno will feel it. I know mine did anyway.
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