Why not fix it right with a $12.55 part off amazon, takes 5 mins to put on. No more lean codes and Reliable fix! 700 miles is a long time to risk it.....
https://www.amazon.com/MOSTPLUS-Inta...Toyota+4Runner
Luck and enjoy that Runner.
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2001 Limited 4WD - 346+K - SunfireRed\Thunder Cloud; - 265/75/16 Michelin A/T2s - Fat Pat's 1.5" BL - StopTech ANGLED rotors - In series 699 trans cooler, New Yota1 transmission, All new OEM suspension front to rear.