cdf43

87 cherokee 4.0

nybody with an 87 or similar, how many O2 sensors are ther, just two right?

also my local parts store only has bosch, any expericance with those?

Slick761

Only one sensor.

cdf43

pre or post?

and bosch?

tjwalker

One sensor. My first choice for oxygen sensors is NTK (the oem supplier to Jeep) My second choice would be Bosch.

Slick761

Pre or upstream

Gee oh Dee

Before the cat.

My o2 sensor on my 87 is snapped off and dangling down by my front diff

I still drive it daily with no issue.

DFlintstone

Just curious, wouldn't that #*%#-up your mileage?

Slick761

Ya it will

cdf43

Alright cool. Thanks for the info

tiwvr1

I think every post ohh gee dee makes they have to refer to how they broke there 02 and are still driving it. i honestly dont know how its possible with out effecting milage and dribability pretty bad.

Slick761

Drivability not so much.... gas mileage yes. The ecu will keep those things running in some wild situations. Just goes into open loop and pours out gas... or on many sensors if you get a short to ground it will do the opposite. Or as my buddy cruiser has reminded me twice another sensor will cause the injectors to batch fire wasting gas.

cruiser54

The ECU has a default mode when it can't go into closed loop due to poor sensor input. Gas mileage suffers. Performance does, too, but what one guy considers running good, we may say it runs poorly.

All relative, especially to those driving around with dangling oxygen sensors.