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Old Yesterday, 19:12
Royal Nonesuch's Avatar
Royal Nonesuch Royal Nonesuch is online now
1988 XJ Pioneer
Join Date: Apr 2015
Location: Pasadena, CA
Posts: 122
Re: Testing Jeep O2, Oxygen sensors

Originally Posted by randy57 View Post
What were your fuel trims?
Did it loop open/closed back and forth on cold start?
Wish I could find a new o2 sensor that didn't have the pre-heating element.
Fuel trims were OK in the beginning, but slowly started to creep high. As it failed, I noted it would open/close on cold but eventually just stuck open.
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