So I bought a OBDII reader and hooked it up to my '96 D1 because I have a CEL. It came back with 5 codes... P1179, P1177, P1316 and then P0300 pending along with P1316 pending. Any help would be much appreciated.

 

P1179 Maximum Negative AMFR Correction Fault
P1177 Maximum Negative FMFR Correction Fault
P1316 Misfire Excessive Emissions Fault

Pending
P0300 Random/Multiple Cylinder Misfire Detected
P1316 Misfire Excessive Emissions Fault

What all does that mean?

 

It means you need a tune up.

 

Well, I've replaced the fuel filter, fuel pump, plugs and wires. I've also replaced all vacuum lines that needed it.

I checked the fuel pressure with the key on it was 34 and while running it was steady at 30.

 

What plug wires did you use?

 

Stuff from autozone. I know, mistake! Should I order this kit from AB?Tune Up Kit | Land Rover Engine Parts at RoverParts.com

 

That would be better than AutoZone plug wires, but better yet would be Kingsbourne, STI or Magnecore plug wires.
Cheap spark plugs are fine.
Once you get the new plug wires you can return the Duralast ones and get your money back.
My first set of Duralast plug wires lasted a year, my second set lasted a week.
Magnecores and it has been over 3? years.

 

What about replacing the front O2 sensors? My disco idles rough and stalls. I also want to throughly clean my MAFS hoping that might help.

 

Clean IACV and the hole it mounts in. IACV rules the idle process. Clean throttle body.

If that doesn't get most of it, consider cleaning MAF with a cleaner made for it, when it is cold, may help with your first two codes.

 

Pulled the IAC this morning and it's pretty nasty. Tomorrow I am going to clean it really well along with the throttle body.

I'm hoping this will fix my stalling issue. If that doesn't fix this issue what should my next step be? I plan on cleaning the MAF as well and replacing my air filter. I also am going to check and make sure that the throrrle body bolts are all tight to spec. Should I seafoam the engine?