ok so i was driving my truck one day and it started to miss extreamly bad.. my fuel pressure is great, new fuel filter, full tuneup. so i hooked it up to my obd1 scanner and the only problem is the my O2 senser says its in open loop and wont close off when it heats up. i am at my wits end with the truck. if any of you can help me out let me know, and thank you in advance.

 

replace your o2 sensor?

 

it dosent govern weather it woud stay in a open or close loop thought would it? i mean its worth a try, the o2 wosnt cloged and the wires were in great shape..