P38 4.0 thor lack of power after 2000 rpm and not on all cylinders.?

Why does this effing site log me off after typing a message then loosing everything??????????????? Bad enough having a frustrating car!!!

Update..

Checked Lambda readings both switching from 0 -0.75 volts
Air flow meter increasing with load
throttle position % increasing with throttlle imput

Dissconected Air flow meter, drove car with no change to its running or Idle, didnt put EML light on either

Re connecter AFM and disconnected TPS, car started and searched for a idle, drove a bit flatter with no kick down and gearbox fault came up on dash, still no EML light not alot of change in performance?

Car still running like it on 6 and two half cylinders, above 2000 rpm under acceleration and now drinking expensive fuel

Nothing appears to put EML light on although it comes on self tests and go's out on start up. I have also dissconnected the lambdas while running and they havent even recorded a fault code in the ecu?

Do these ecu's give troubble and are the coded to the vehicle or a stand alone unit and not immobilised...? could I try another engine ecu on a plug and play basis?

Hi guys, is there anyone in or near the Gloucester area with the diagnostic system to do a full code read, clear and a adaptive value reset please...?

I'm just north of Bath if its any help.

eightinavee said:

I'm just north of Bath if its any help.

Click to expand...

Thanks for that eightinavee, I may take you up on that, Im getting stumped as nothing appears to make any difference or much sence..

Final Update,
Had an appointment with Dr. eightinavee who carried out a medical, after deciding the heart was basically ok and pumping on eight he gave the ECU an electronic enema to purge it of old stored fault codes, once detoxed ECU was drip fed with new adaptation, sterilised and then road tested where it did nought to sixty by the second gate on the right which is normal for a 4.0 thor in that neck of the woods and it was doing 18 to the gallon on the way home on a twisty A road?
Like to thank him for his time and help today and even though car is still adapting feels good again.
Truly Nice chap...
Many Thanks...

Nice to meet you again,hope the RR behaves... I think we should investigate a power upgrade with RM500 engines !