high fuel consumption

2009 VOLKSWAGEN GOLF
27,000 MILES • 1.8L • 4 CYL • FWD • MANUAL
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NG SIINGWA H
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  • 1 POST
My car is heavy on petrol it takes out black smoke and pinks it switches off almost every stop. please help me cannot even drive the car as the problem is worse now.
Sep 17, 2016 at 12:08 PM
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FREEMBA
  • ✓ASE Certified Mechanic
  • 1,152 POSTS
  • ASE Certified Mechanic
The Mass Airflow Sensor fails on these sometimes and could cause high petrol consumption. Try cleaning it with an approved cleaner. While you are at it, clean the throttle body as well (with throttle body/carburetor cleaner). Finally, have the fuel pressure checked. Low fuel pressure can cause excessive fuel consumption.
If you check engine light is on, have the computer scanned and post the codes here it you need further assistance.
Sep 17, 2016 at 12:41 PM
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