You can check the output voltage, but I couldn't tell you what it's supposed to be. I think most of them have a 0-5 volt output depending on the A/F ratio.

 

Hey, regarding the O2 sensor, how were you able to access it. Was it through the wheel well, engine bay or from below. I am currently trying to change mine and am finding it difficult to get a wrench on it. I don't wan't to remove the exhaust manifold or anything like that. If someone has some advice for getting to the sensor or any other tips it would be appreciated. The truck is a 89 150 with a 318ci

 

The 02 sensor is in front on the left side of the manifold. There is a slotted socket avaliable at your friendly Autozone. Mine was about 10 bucks. Make things alot easier.

Good Luck

Tony

 

only 10 my 1992 150 gets 22 to 25mpg on the highway.

 

My 86 D150 318 gets 13 and I live in the country, about 15 miles from town. I don't get on it much. I ahve 31's in the back and 235/75 15's in the front. it does need a tune up, and the cats are cut but the smog pump is still there. it has what I think is a one bbl holley, but I"m not too sure, been getting mixed answers from friends (its ford and mostly chevy country here)... any ideas on the carb? http://www.i-star.com/users/chargeit2/dodge.htm the bottom two pics.... and anything I can do beside a tune up to improve fuel mpg?