loss of power

[nickyb262]

im looking into buying a 4runner...an 88 2 b precise.... the only problem with it is when it warms up it loses power....still drivable but loses power.... any ideas from any 1 would b appreciated.

 

[Diverse4runner]

My guess would be o2 sensor. When the motor warms up it relies on the signal from the o2 sensor to tell if its running lean or rich. Also, do you have a CEL (Check Engine Light) on? Maybe someone else might have some ideas to what it might be.