Hi Everyone
It's a bit late but I thought I'd let everybody know that the heater throttle body connection was leaking coolant and this ran down the back of the engine and onto the O2 sensor harness. This resulted in a short of some sort and screwed things up. I fixed the coolant leak onto the O2 sensor and all was resolved.
I think that if your D2 has issues shifting into fourth and is idling OK, then look for this leak and if there isn't a leak then look at the O2 sensor/s rather than the MAF...but who knows with Disco's
Cheers
Erron
It's a bit late but I thought I'd let everybody know that the heater throttle body connection was leaking coolant and this ran down the back of the engine and onto the O2 sensor harness. This resulted in a short of some sort and screwed things up. I fixed the coolant leak onto the O2 sensor and all was resolved.
I think that if your D2 has issues shifting into fourth and is idling OK, then look for this leak and if there isn't a leak then look at the O2 sensor/s rather than the MAF...but who knows with Disco's
Cheers
Erron