1999 Toyota 4Runner Limited 3.4L Poor Idle Quality, Poor Fuel Economy, MIL Lamp on
This 99 Toyota [...] has a PO171 System lean code, fuel trim is going crazy, smoked the system, no leaks found, fuel pressure is good, no leaks in the air induction system, O2's are good, MAF tests good... Thanks in advance for your assistance. David
FIX posted 12/6/2007
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Vehicle Data1999 Toyota 4Runner Limited
Trouble Codes
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Vehicle Data
1999 Toyota 4Runner Limited
VIN | JT3GN87ROX |
Engine | 3.4 L / 6 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | FI / mpfi |
Emissions | OBD-II Compliant |
Symptoms | Poor Idle Quality, Poor Fuel Economy, MIL Lamp On |
Occurs | Always |
Trouble Codes
P0171 | Fuel System Too Lean (Bank 1) |