1994 Honda Civic 12.77 Miles per Gallon

Tiny
MYUTOPIA143
  • MEMBER
  • 1994 HONDA CIVIC
  • 4 CYL
  • 2WD
  • MANUAL
  • 253,000 MILES
My car is currently getting 12.77 miles per gallon, and I was thinking that it may be a vacuum leak; because when I turn the engine off it hisses as though air is escaping. What type of hoses do I use to replace existing vacuum hoses? Is there a diagram available so that I can see where they are all located on my car? Thank you for your time in helping me with my issue.
Angela T.
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Wednesday, August 12th, 2009 AT 2:37 PM

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Tiny
F4I_GUY
  • EXPERT
All the small ruber hoses are vacuum lines (there aren't many) But it can leak from gaskets as well.

The easiest thing to do is get a propane tank, open it up and place it beside the intake manifold and move it around with the engine on. If you find the leak, the idle will rise up.
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Wednesday, August 12th, 2009 AT 5:57 PM
Tiny
MYUTOPIA143
  • MEMBER
Thank You F4I_guy!

I don't hook up this propane tank to anything? I just place it beside the intake manifold?
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Thursday, August 13th, 2009 AT 9:27 AM

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