Hi there!!! I took my D2 off road the other day and i went into a deep water hole, the disco float for about a min, traction control and cdl got me out, snorkel work fine...... Ok, I got out of there drove my disco back home but I notice a litle missfire and stop the LR got out and open the hood and saw sparks all over the place.. so I knew it was time for a new ignition wires set... So i took the intake out and order my set of new wires right.... Ok today I put everything back crank the engine and plug my obd2 scaner to get the live data... Everything was fine, all 8 cylinders fire up perfect but i notice the engine starter to runn roff and getting worst.. temp was under 190F so i get under the LR and notice the catalyctic converter on bank 1 was red, on idle speed..... So I know this cats are made of titanium. Cut be that they got clug? and the ecu is trying to adjust the idle and it just can't keep up with clug cat???? I never seen a disco 2 with a bad catalytic..... Also i need to point that im not getting any codes at all.....At first i was thinking that it was the mass sensor dirty and clean it up and nothing.......

 

It is getting to much raw fuel dumped into it and it is getting to hot because it is burning the raw fuel.
Either your turn up was bad, or something else is causing it to run to rich.
Could be a number of things, plugs gapped wrong, bad wires, bad O2 sensors, bad/dirty MAF, etc.

 

I remember one time about 6months ago, the air box was not seal right and off roading on muddy water the mass sensor got dirty and she was doing the same thing as right now, so that was the first thing I check when I saw this.......... Ok so my cat's are fine?
Mmmmm I pulling the plugs out tomorrow to see if i see something wrong..... The thing that **** me off is that im not getting any codes men.. And I drove the truck for about an hr.. Im not getting any pending codes or any codes at all........ Like shes telling me that everything is fine, and cut be just a bad cat? Jesus bro.... I'm complete lost this time

 

Oh by the way.. What do u mean by my turn up was bad...... Turn up?

 

Tune up, I did not do a very good job of proof reading, I meant tune up.

 

Oh ok ok..... I found what the problem was... trotle position sensor was plug in but not all the way, I did this very late at night and I was very tired, so when I doble check everything the next day I found this plug not all the way conected.... The bad thing was that I clean the mass sensor like twice thinking that that was the problem, well I end up messing the mass sensor LOL... I get a new one tomorrow =) LOL... Anyways I knew that cleaning the mass sensor is a 50% chances of ruin it so... It's all good!!!!!! Thanks anyways Spike!!!

 

Glad it all worked out for you.

 

LOL I know..... But I found a small factory hole in my air box LOL Thats how the mass air sensor keep getting wet everythime i was going in to deep water... I get the plastic box's out and seal it with silicon =D.... End of story !!!!!!