Black smoke and consumes more fuel.

2000 TOYOTA SIENNA
177,973 MILES • 6 CYL • FWD • AUTOMATIC
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DELWAR
  • MEMBER
  • 1 POST
My 2000 modelled sienna is consuming more fuel and emitting black smoke. I changed all the spark plugs, the air filter, engine oil and filter, checked it by computer specialist but didn't show any faults. Can you tell me what should I check and repair cause I wasted lots of money just only on this problem.
Jun 16, 2015 at 10:23 PM
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MHPAUTOS
  • ✓ASE Certified Mechanic
  • 31,937 POSTS
  • ASE Certified Mechanic
You may have a faulty fuel pressure regulator, get the fuel pressure tested, if it is high a faulty reg can cause this with the symptoms your are experiencing.
Jun 17, 2015 at 5:04 AM
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