Hi all hopefully someone you can shed some light on my old rangerover otherwise its ebaying time ...
My 4.0v8 gems engine has idiols issuise ill try explain
Cold start revs up to 1500rpm and stays there until engine starts to warm up then drops to 800rpm as engine goes to correct running temp it starts running very low lumpy idiol and cuts out..
Theres no flat spots .plugs ht leads coil changed.new temp sensors gauge and ecu sensor
Iacv replaced cleaned.
I plugged reader in and stated bank b ( lamda was buggerd ) i asssumed bank b is ns ???
I changed it for a new one with no real differnce
So then did a compression all 8 show 10.5 .and all plugs are same colour .then did a fuel rail chech im seeing 37psi on prime .( i need to check then running ) anyone know as i carnt seem to findany vac leaks

Is accelerator cable correctly adjusted??

I would get some readings from your MAF (Mass air Flow meter) to see if thats playing up. Dont be tempted to get a cheap replacement from the popular auction site though.

I would expect to see in the region of 20/22 kg hr at idle and 90 + kg/hr at 3000rpm. Make sure all loads are off the engine.