1999 Chevy S-10

1999 CHEVROLET S-10
170,000 MILES • 6 CYL • 4WD • AUTOMATIC
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MICHAELKRIZEK
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  • 2 POSTS
i have a 1999 S 10 it has 2 trouble coads P0171 system to lean Bank 1 also P0174 system to lean Bank 2 when i first start out it seams to be doging and runs rilly rough even at wide open throttle then it will eventualy have more power
Apr 14, 2009 at 3:58 PM
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JAMES W.
  • CERTIFIED EXPERT
  • 2,394 POSTS
How old is the fuel filter?
Have you checked the fuel pressure?
A real common cause of what you describe, if the above are OK, is the O2 sensor. Please advise.
Apr 17, 2009 at 9:33 PM
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MICHAELKRIZEK
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  • 2 POSTS
the fuel filter is newer less than a year and the pressue was 56psi with the key in the run position and 52psi at idle if i rap the throddle it seams like its going to die afer the rpms level out to idle plugs wires and cap and rotor are also new
Apr 21, 2009 at 2:38 PM
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