Replace Oxygen Sensor When Servicing EGR System on Toyota Pickup

Over the time the exhaust gas recirculation (EGR) system may become plugged with debris, the oxygen sensor may also be getting slow or 'lazy' around this time. When servicing or cleaning  the EGR system, it is a good idea to replace the oxygen sensor because it works in tandem with the EGR system.

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Average mileage: 218,000 (218,000–218,000)
6 model years affected: 1990, 1991, 1992, 1993, more1994, 1995
7 people reported this problem
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problem details
1991 Toyota Pickup 218,000 mi,
i stil have not found da problem it has no power ive replaced everthing but da mass air sensor could someone help me its a 3.o efi automatic 4 wheel drive emailis bigdaddie1010@yahoo.com thank u