What's a normal vacuum reading on a Ford 300 I-6? I installed a vacuum
gauge over the weekend and when I drove the truck on Sunday high idle
vacuum was very high, 18 or 19 in. Hg. and idle in drive something like
15. Coasting would hit 21 or 22 in. Hg. Today I drove it again and it
never got about 16 in. Hg. what gives? I don't *think* I have any
vacuum leaks...
nate
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