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1997 Ford Ranger Vacuum system

Tiny
JCROWN
  • MEMBER
  • 1997 FORD RANGER
  • 4 CYL
  • 2WD
  • MANUAL
  • 19,500 MILES
Hi
What is the best way to find a vacuum leak on the engine. I have a P0171 fault code (system too lean). A friend said that can either be caused by a vacuum leak or a bad mass air flow sensor. I'd like to check for the vaumm leak first.
Friday, December 28th, 2007 AT 12:20 PM

1 Reply

Tiny
FAIRRACING31
  • MECHANIC
  • 150 POSTS
Get a can of gumout and spray it around your vacuum hose's and intake manifold. When you hear your RPM change, you have found your leak.
Happy New Year :)
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Monday, December 31st, 2007 AT 5:43 PM

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