Hi anybody any ideas?
I have a 3.9V8 Disco Safari 1998 Model. It has developed a problem whilst running on lpg on sharp acceleration it will hesitate or backfire but will only do it if I am accelerating from below 1000RPM once the engine is reving it wil behave fine up to about 3000RPM sometimes further then it again hesitates as if not getting enough fuel or spark to rev higher. If I pull away gentle it will hesitate a bit but once the revs reach above 1000 then it will pull away fine and only struggles when it reaches higher revs as said above.
On petrol it starts and pulls away fine at any throttle opening and revs to 5000 fine although it occasionally sounds like it is missing a little but mostly fine.
I am guessing an electrical problem which is worse when running on LPG as it is more difficult to ignite etc.
So far I have changed HT leads, Rotor arm, new plugs(ngk BPR6es) next on my list is new Dizzy cap(tho mine looks very new) then a new coil.
any ideas guys?