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Black smoke and consumes more fuel.

Tiny
DELWAR
  • MEMBER
  • 2000 TOYOTA SIENNA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 177,973 MILES
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.
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Tuesday, June 16th, 2015 AT 10:23 PM

1 Reply

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
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.
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Wednesday, June 17th, 2015 AT 5:04 AM

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