VACUUM SYSTEM

1997 Ford Ranger

Tiny

jcrown

December, 28, 2007 AT 12:20 PM

Engine problem
1997 Ford Ranger 4 cyl Two Wheel Drive Manual 195, 00 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 freind 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.

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1 Answer

Tiny

fairracing31

December, 31, 2007 AT 5:43 PM

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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