vacuum leak on 2000 celica

2000 TOYOTA CELICA
100,100 MILES • 4 CYL • FWD • AUTOMATIC
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ARL
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  • 2 POSTS
would a vacuum leak on a 2000 celica cause engine performance to drop from 30MPG to less than 20 ?
Jan 28, 2011 at 5:39 AM
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KHLOW2008
  • ✓Experienced Mechanic
  • 41,814 POSTS
That is possible. A vacuum leak would affect the idling speed and O2 sensors which would indicate a lean condition and inform the compuuter to enrich the running.
Jan 28, 2011 at 5:56 AM
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ARL
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Thank you so much for prompt response..
Jan 28, 2011 at 7:40 AM
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KHLOW2008
  • ✓Experienced Mechanic
  • 41,814 POSTS
You're welcome.

Have a nice day.
Jan 28, 2011 at 11:27 AM
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