2001 Chevy Silverado 2001 Silverado complete loss of power

Tiny
SILVERMAN
  • MEMBER
  • 2001 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 15,300 MILES
My 2001 silverado starts and run fine gives no codes until on the highway for 10 to 15 minutes. Then I have a complete loss of power but it stays running. It then codes po 171 and 174 left and right bank too lean. No warning or display on dashboard. When it is cold started it runs fine and initially displays no codes and passes all I M monitors. I have just changed my fuel filter my alternator my fuel pressure regulator and the EGR valve. I also cleaned the MAF with MAF cleaner. There is no change. Any help greatly appreciated.
Saturday, July 19th, 2008 AT 4:58 PM

3 Replies

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
http://www.2carpros.com/car_repair_video/test_fuel_injection_pressure.htm
Go here and checkout our video.
You can rent the test gauge at Autozone.
Chevy also recommecnds using "Top Tier Detergent Gasoline" To keep injectors clean!
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Saturday, July 19th, 2008 AT 7:31 PM
Tiny
DJNETO
  • MEMBER
  • 4 POSTS
CHECK CO SENSORS!
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Thursday, July 24th, 2008 AT 4:05 AM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Ok first of all they are )2 sensors, and if there is no code for them, they are ok. Lean codes pop when there isnt enough fuel, or there is too much unmetered air, due to a vacuum leak, or a crack in the air intake plenum.
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Thursday, July 24th, 2008 AT 3:56 PM

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