Thread: feel like Too rich mixture

check the air filter, and air intake ducting.

check the throttle position sensor, if the ECU isnt reading a more pedal position then you get no more fuel and no more power, just a leaner run.

Much better mate. Thanks.

As for your issue. I'm not sure if I can be much help, as I don't know the V8's and the auto's all that well.

What I would suggest, in an older Audi I used to have, there were two things unplugged. Who the hell knows why, crazy previous owner!?!?! The idle control valve had an electrical component to it, the plug for this was detached. There was also a plug from the ECU that sent some basic sensor information to the auto (engine speed, temperatures, throttle position, etc), this was also detached.

Those two items being unplugged didn't stop the car from working, but it did make it a little sluggish in gear changes and it would rev up and down when standing still like yours is. So possibly this is an issue for you, though as I said I'm not entirely familiar with the LR V8's and autos so it might not apply.

One other thing that may present your symptoms is overheating. It is possible some mild overheating (slowly occurring head issues, etc) may cause the engine to "surge" momentarily as some "simpler" ECU's get a little confused and inject a little more fuel to bring the temperature down (in a N/A petrol) as it assumes that it is running too lean because it is only slightly over temperature. This is from experience on previous vehicles as well and again may or may not apply to the Disco V8 auto.

Hope they give you something to look at. At some stage soon someone else should jump in with a, quite likely, better suggestion.

Chris



Edit: Hahaha, see, someone else waaaay more knowledgeable beat me to it!