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I have an 87 myself and was recently looking for it (I run a single exhaust after the manifolds) and I believe that they are pre-cat censors, so they should be about halfway between the manifolds and cats. not sure if it's the same for yours though.
this helps if you have catalytic converter trouble because it can be damaged or even removed without effecting the EFI system or your gas milage
What else can I help you with?
Where the oxygen sensor circuit fuse on 04 silverado 2500hd?
were is the fuse located for the O2 sensor
How do you install a oxygen sensor on a 2005 silverado?
Screew it out, and screew the new 1 in.
Where is bank 2 sensor 1 oxygen sensor on a 2004 Chevy 1500 silverado?
That would be the passenger side of the engine and it will be the first oxygen sensor that's screewed into the exhaust pipe on that side.
Where is the oxygen sensor located on a 2002 Chevy silverado?
There are several and they are all located on the exhaust system.
Is a bypass available for a Chevy silverado oxygen sensor with headers which makes the check engine come on?
NO!!!
Where is the oxygen sensor on a 1995 Chevy silverado 5.7 L?
right in front of the catalitic converter
Where is the oxygen sensor on bank 2 sensor 2 on a 2004 silverado?
Usually bank 2 sensor 1 & 2 are right after the converter in the exhaust pipe.
1987 Oldsmobile cutlass ciera oxygen sensor location?
what is the oxygen sensor location on a 1993 oldsmobile cutlass ciera 3.3l v6
Where is the oxygen sensor on a 1987 Ramcharger?
It is in the driver side exhaust manifold.
Where is the oxygen sensor on a 1990 Chevy silverado 4x4?
It is in the exhaust pipe where it comes off of the engine on the passanger side.
Where is oxygen sensor bank one sensor two on 1997 Chevy silverado k1500 305 engine?
drivers side second one back by transmission
Where is heated oxygen sensor bank 1 sensor 2?
I have a 2004 Silverado 4.3l engine, my questions is are all 4 02 sensors the same are they interchangeable
