Car runs better with the maf disconnected.

Tiny
RUDDFAN2
  • MEMBER
  • 1993 MERCURY VILLAGER
  • 240,000 MILES
Car ildes low and blows black smoke with maf sensor connected. With maf disconnected car runs better. I tried a new maf sensor and the same thing happens?
Monday, September 5th, 2011 AT 4:29 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Refer to this link for more information on black smoke/running rich

1. Excessive fuel pressure can be cause by restricted fuel return line
2. Defective Oxygen Sensors.
3. Leaking injectors and fuel pressure regulator.
4. Coolant temperature sensor out of calibration.
5. Restricted air intake system.
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Monday, September 5th, 2011 AT 4:41 PM

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