Missfire!

[Jcerb]

I am getting a juddering miss fire under load at low revs then it clears, it's fine through mid to high revs and still pulls very hard. Had a so called specialist/dealer look at it today and couldn't get to the bottom of it! It recently had a 12k service new leads, plugs etc. Could it be a dodgy plug/lead? Also i was told the throttle pots were setup, could it maybe one of these or a coil pack? Any help would be much appreciated. Cheers

[Gazzab]

Coil packs sound like the culprits.

[Jcerb]

Did notice cracking on one of the packs earlier! Around the edge, i'll go and buy some tomorrow and see. Hopefully they aren't to difficult to fit. Thanks for that, worth a try.

[leman600]

Defo sounds like coil packs. Had almost identical symptoms a year ago. I believe they are most stressed at low revs full load. Also showed up on diagnostics software as rich due to unburned fuel getting through. ECU leans out accordingly and then trace pinking.(too lean) double wammy.

[Jcerb]

Oh fingers crossed this is the issue! Thanks for your input, as for makes is it worth getting the bosch ones? Are Valeo any good, quinton hazal?

[bashking]

Get the Bosch ones mate, they are much better quality.

[Jcerb]

Yeah got to be the best!