Really weird fault. No fault codes with numerous scanners used.
vehicle drives perfectly when cold, when hot it hesitates/misfires and lacks power, but only in 4th gear.
We have blanked off EGR valve, but no differance.
Obviously we have checked for air leaks etc, vehicle does'nt smoke and starts perfectly.
There are 4 sensors on gearbox and transfer box, but as far as we know, they are reverse lamp and neutral switches on gearbox and 4wd and neutral switches on tranfer box.
Any ideas greatly received, many thanks Andy