Hi fellas. Just got major fail with emissions on MOT. I have a 2001 P38 4.0 V8 runs on LPG. Just replaced coil pack, ht leads, plugs, changed oil and filters and put on new cats and lambdas. It failed on petrol and was even worse on gas... Petrol 4.90 co level, 182 hoc level which was under. On...