1997 Discovery OBD codes

[Theduke335]

I know this has been covered else where but i am getting 2 codes on my Disco a P0300 (which i have read is multiple misfire..also heard its a injector issue on #8 cylinder..Which is it?) and a P1193 code (open on downstream O2 Sensor) Well the Disco runs great with no issues (other then an oil light that comes on at idle after it has been running for about an hour) but it still runs fine after that .. So what could be causing these codes and is there a good fix? Also anyone know what socket you use to remove the oil sending unit?

 

[greg409]

Have you done anything to sort out the misfire?

Plugs, wires?

what issue on #8 injector?

How often have you changed your oil?
Oil pressure sensors aren't known for problems, other than gasket leaking.
I used a large wrench on mine to replace gasket

luck,greg

How many miles on your DI?

 

[Theduke335]

it might be the plugs and the wires ..i took out a plug to look at it and it was pretty dirtyso i will try that first