1991F150guy

Hi, would anybody possibly how many o2 sensors a stock 91 5.8 would have? I think it's got 1 but not 100% sure. Just want to know because I am replacing the exhaust, y-pipe, all the way back. On that note is there anything else I need to look out for or replace while I'm doing that?

qdeezie

It only has one O2 sensor.

mjb41847

I have a 2001 ford f150 and I have 4 o2 sensors. two in front and two in back of cat.