Auto Answers » View Question
billy 1/14/2011
2000 GMC Sierra 1500 SLE 8 Cyl 5.3L - Engine
Low RPM's, rough idle, stalling
Using an OBD code reader the following came up: P0171 system too lean(left bank) When engine is cold the RPM's fluctuate high and low to the point it almost stalls. When warm, very low idle and RPM. Will stall out when waiting for a light to change. At first I thought it was a miss, proceeded to change plugs and wires, still same problem. It is a 2000 GMC Sierra pick-up 4x4 with a 5.3 liter. It has 441,500 miles on it. email [email protected]
1 Answer
  • david
    david 1/14/2011
    clean throd body with carb cleaner with engine off open throd wide open wipe out with a rag repace idel air control valve or clean it an throd body where it go

Preview Answer