1986 Vacum Problem
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Junior User
Joined: Oct 2009
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From: spring,tx.
1986 Vacum Problem
i have a 1986 f150 with 302 fuel injected auto trans. whats the best way to check for vacum leaks? with the truck running i cant hear anything. i have a rough idle. but runs fine while driving. thats why i think its a vacum leak. what about the mechanic stethiscope? i have a vacum guage is there a place to hook in to let me know if there is a leak somewhere? thanks
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Joined: Jan 2001
Posts: 56,992
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From: Virginia
Some people take a propane torch, open the valve a little bit, but don't light it. If the propane gets sucked into the engine, it will make it idle faster.
Someone might have a safer way, but most anything you spray or use will be volatile so the engine will burn it, so be careful.
Someone might have a safer way, but most anything you spray or use will be volatile so the engine will burn it, so be careful.
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