1990 Pioneer 4x4 Posted September 7, 2009 Share Posted September 7, 2009 What is this and what is it supposed to do? Link to comment Share on other sites More sharing options...
cherokee Posted September 7, 2009 Share Posted September 7, 2009 sort of looks like a broken knock sensor and the o2 sensor plug... that's actually normally in the area of the driver's side motor mount. Link to comment Share on other sites More sharing options...
Oizarod115 Posted September 7, 2009 Share Posted September 7, 2009 sort of looks like a broken knock sensor and the o2 sensor plug... that's actually normally in the area of the driver's side motor mount. :clapping: Link to comment Share on other sites More sharing options...
1990 Pioneer 4x4 Posted September 7, 2009 Author Share Posted September 7, 2009 sort of looks like a broken knock sensor and the o2 sensor plug... that's actually normally in the area of the driver's side motor mount. thanks. but what do they do and do i really need them, as my truck seems to run fine. :huh???: Link to comment Share on other sites More sharing options...
maddzz1 Posted September 7, 2009 Share Posted September 7, 2009 Those are for the interior diff cover light I wouldnt think the truck would run to well w/out the O2 sensor hooked up. Is your O2 sensor plugged in? Link to comment Share on other sites More sharing options...
jpdocdave Posted September 7, 2009 Share Posted September 7, 2009 mine would not run more than a few minutes without the oxygen sensor, and it looks like the o2 sensor plug to me also. Link to comment Share on other sites More sharing options...
1990 Pioneer 4x4 Posted September 8, 2009 Author Share Posted September 8, 2009 I wouldnt think the truck would run to well w/out the O2 sensor hooked up. Is your O2 sensor plugged in? Where would it "hook up" at? i ran it for over an hour today and didn't notice anything wrong. Link to comment Share on other sites More sharing options...
Oizarod115 Posted September 9, 2009 Share Posted September 9, 2009 I wouldnt think the truck would run to well w/out the O2 sensor hooked up. Is your O2 sensor plugged in? Where would it "hook up" at? i ran it for over an hour today and didn't notice anything wrong. it will default to full rich, and will run... could possibly overheat your catylitic converter but no other damage can be caused really, poor fuel mileage too. follow the exhaust from the engine there ought to be a sensor just above the joint in the exhaust, it will have a pigtail with a plug on it that will join to your mystery plug. the other one is half of a broken knock sensor which will be located on the drivers side of the block up a few inches from the pan. somewhere between #2 and #4 cylinders Link to comment Share on other sites More sharing options...
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