Trying to figure some things out with my 97 Discovery and am having a very hard time. Replaced VSS, MAF,Plugs, wires,fuel pump, filter and still having issues. Codes throwing is P0300, P1316, P1193. I bought this Scantool that hooks to laptop and am able to pull quite a bit of info. I noticed that the O2 Sensor 1 Bank 2 drops from .0920 V @20% st fuel trim down to .075 V @ 20% st fuel trim. See I am pretty tired of putting money in this just swapping out thing not fixing my sputters and inefficient running. Car idles and runs great just sputters when accelerating. So would this O2 actually be my problem? and which one is it? Also once the vehicle hits OD it has a shake. Can I test an O2?
txs

 

what a pain in the rear...trying to figure all this crap out on the GEMs.

 

The GEMS is the simplest engine management system out there, it is only two steps removed from a carburetor.
No a O2 sensor will not cause hesitation during acceleration.
A bad O2 will cause bad MPG but thats it.
Run long enough with bad O2's and you will carbon up your valves and that will cause bad run problems.
A bad knock sensor, cam sensor or crank sensor may also cause these problems.
What grade and brand of gas are you using?