code po171 and 174 system running lean bank 1

2002 CHEVROLET TAHOE
120,000 MILES • 4.8L • V8 • 2WD • AUTOMATIC
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MAXCAB
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  • 1 POST
I have changed the O2 sensor, fuel filter and air filter. Cleaned MAF sensor, MAF filter and throttle body and the car runs idle for about 30 secs and then it dies
Jul 26, 2014 at 10:19 AM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
scan for codes and check fuel pressure with a gauge first. auto parts rent it
Jul 26, 2014 at 10:31 AM
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