Cigarette smoke to find vacuum leak

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m0nkeyprince
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Joined: Sat Jul 10, 2010 7:03 am
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Location: Bay Area, CA

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I apparently have a vacuum leak, and after searching around, i dont want to buy a fog machine just to diagnose it.

Would lighting a bunch of cigarettes do the trick?


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Towncivilian
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Never heard of this. Spray brake cleaner or starting fluid around possible vacuum leak areas (intake air hose clamps, manifold gaskets, etc); if engines RPM rises, you found your leak.

Pathfound49
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No no no monkey. That would be sacrilege to waste cigarettes on that. A certified letter from the IRS, or a court summons would be much more effective.

Just kidding. I don't believe the smoke would be dense enough, but you could try it.

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Innovazn
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any codes? (sorry if its been posted musta missed it)

When i still had my pathy, my "leak" was really my evap canister... Rockautoparts has it cheap.

m0nkeyprince
Posts: 329
Joined: Sat Jul 10, 2010 7:03 am
Car: 1998 Qx4
Location: Bay Area, CA

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yeah, a specific cylinder misfire shortly after my post.

What im supposed to do though, instead of seeing where the smoke is sucked in (which i doubt will be thick enough because of the fan blowing), is with the engine off, blow into one of the vacuum hoses and see where smoke escapes

though with a specific cylinder misfire (#5), it cant be a vacuum leak because a vacuum leak would cause a random misfire i think


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