1998 Cadillac Concours P0300 Slightly Rough Idle Long Term Fuel Trim High Bank

1998 CADILLAC DEVILLE CONCOURS
61,000 MILES
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ANONYMOUS
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P0300 slightly rough idle long term fuel trim high bank 2. Any help would be appreciated
Dec 17, 2012 at 8:10 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
check fuel pressure first shold be 48-55 psi.
Dec 17, 2012 at 8:13 AM
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