I have a 1995 2 litre inj Espace J7R that has a persistent misfire despite fitting new plugs, leads distributor cap and rotor arm and lambda sensor. A compression test showed no problems either. Fuel consumption has also suffered. When it is warm it has full power and will idle without stalling but still with a misfire. When it is cold I have to keep the revs high just to keep it running and there is a distinct lack of power where I have to slip the clutch to get up even a gentle slope. After a couple of miles it gradually gets better. I have looked for a MAP sensor to try a replacement that the manual says should be on the left OR right hand side of the engine bay connected to the inlet manifold by pipe but there is nothing. There are only Three tubes connected to the inlet manifold that I can see, one goes to a sort of metal capsule mounted under the inlet manifold and the other tube disappears to the rear of the engine bay and underneath the steering rack. The third one goes to the idle control valve. The car is dual- fuel (lpg) with a lambda controlled system and the above symptoms are WORSE when running on petrol. Any ideas anyone?