1993 Ford Explorer FUEL EVAP TEST

1993 FORD EXPLORER
74,000 MILES • 4 CYL • 4WD • AUTOMATIC
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BKC
  • MEMBER
  • 2 POSTS
SMOG CHECK FAIL BECAUSE OF THE EVAP TEST.
EVERYTHING ELSE PASSED. WAS TOLD I HAVE A BIG HOLE SOMEWHERE BUT COULD'NT FINE IT . WANTS TO CHARGE 120.00 TO FIX IT. WHAT COULD BE THE PROBLEM AND WILL I HAVE TO PAY SO MUCH TO GET IT FIXED?
Feb 23, 2009 at 9:07 PM
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JGAROFALO
  • CAR REPAIR CONTRIBUTOR
  • 489 POSTS
This test is to determine the effectiveness of the evaporative emission system. This system is to prevent gasoline vapor from passing to the atmosphere. You will find a vacuum line schematic under the hood. There is a vacuum line that goes from the intake manifold to the charcoal cannister (mounted on the L. F. inner fender). Check that vacuum line for leaks, and check that the solenoid valve located in that line is actually opening and closing. With the engine off, it should be closed.
Next, check the line that goes from the charcoal cannister back to the fuel tank. any bad spots in this line will cause a gasoline odor to be smelled under the car. If all of these lines are OK, then there is a leak at the fuel tank or line attachment.
Feb 24, 2009 at 6:55 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.