Hi All, after not using disco for a few days,had a backfire on lpg so switched to petrol,and discovered a miss,most noticible in high gears.replaced coil ht lead,plugs,and checked plug leads, rotor arm and dizzy cap (visual).missfire still there,so replaced coil.missfire,if anything seems worse.Any suggestions on next move most welcome,as I was going to replace all plug leads next
3.9 misfire
- Thread starter tarrevir
- Start date
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jamesmartin
Well-Known Member
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- 91,879
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- louth lincs
you should really swap all ingnition parts at the same time
Silverbeard50
Member
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- 99
- Location
- Bristol
I bought a '95 3.9 Discovery a few months ago; the service history showed that it had received copious amounts of injector cleaner each year, presumably to try to cure a low speed misfire and poor cold running but without success.
I replaced the full HT lead set with a good quality silicone set and the misfire and poor running has gone. There engine is also much smoother at higher revs and seems to have more pull. Definitely worth a try.
I replaced the full HT lead set with a good quality silicone set and the misfire and poor running has gone. There engine is also much smoother at higher revs and seems to have more pull. Definitely worth a try.
discool
Well-Known Member
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- 13,609
If you was running on the vehicles original leads then they were rubber and would have broken down and caursed a misfire, most manufactures now supply silicone leads even Land Rovers genuine part replacement leads are now silicone, but there's silicone leads of poor quality around.
And :welcome:
And :welcome:
