Jon W Posted April 3, 2019 Share Posted April 3, 2019 I am opening this to the board as more views in here hopefully. I have a discovery 2 with 4.0 V8 and lpg conversion. Up until now it has run a dream and no problems at all. However it failed to start the other week due to a failed starter motor. Recovery guys came out to my wife. Did the old hit the starter trick and sprayed some brake cleaner in the air intake to get it going as they said it was turning over slowly. On the drive back it all started to go wrong. With lack of power and misfiring and struggling to maintain speed. I dropped it at the garage on my way home as didn't have time to put a starter on it and needed them to do a few jobs for the MOT. 2.5 weeks later,. they still havent got round to it so I have given up and taken the vehicle back. They have: Changed the spark plugs - this improved things slightly Said they put diagnostics on it and nothing is showing up as faulty, they checked MAF etc. Fault is present whether on LPG or Petrol So where shall I start? Coil Packs? It has magnecor leads already on it When cold if you touch the throttle it tries to flood and really struggles. Any help appreciated, I hoped the garage would put it on diagnostics and know where to look but they are hopeless and have to much work on to give it anytime. Thanks Jon Quote Link to comment Share on other sites More sharing options...
Jon W Posted April 3, 2019 Author Share Posted April 3, 2019 Think I have tracked the problem down to a ignition lead arcing out. But could be more than 1 due to how badly it runs or possibly a coil pack on the way out. Shame it is so hard to reach the coil packs on a D2 just to swap some lead out. A job for the weekend I think Thanks Jon Quote Link to comment Share on other sites More sharing options...
elbekko Posted April 4, 2019 Share Posted April 4, 2019 I'd definitely look at ignition, yes. Take the plugs out and see which ones are firing? Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted April 4, 2019 Share Posted April 4, 2019 If it runs the same on petrol or LPG it's not fuelling related, that leaves ignition. Coils, leads, crank sensor. Quote Link to comment Share on other sites More sharing options...
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