1997 Ford Ranger Vacuum system

1997 FORD RANGER
19,500 MILES • 4 CYL • 2WD • MANUAL
Avatar
JCROWN
  • MEMBER
  • 1 POST
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.
Dec 28, 2007 at 12:20 PM
Advertisement
Avatar
FAIRRACING31
  • CAR REPAIR CONTRIBUTOR
  • 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 :)
Dec 31, 2007 at 5:43 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.