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[gaffer]

Someone must have done this already, but I can't find it. My 2000 MV6 has recently started to misfire under load (it seems OK at steady speed). Plugs are 13K old; wells had a little oil in but have been cleaned out; so have engine-top breathers (not much crud in them); paperclip test is clear. What do I try next? I'd rather it wasn't a replacement DIS pack, for obvious reasons, and because Helpful Local Dealer says it could be any of three, and I don't want to do two dismantles (one to find out which followed by a remantle to get mobile again, then do it all again to replace   ...).

[markey mark]

could well be dispac fella yours will be the oval plug type carnt remember the part number  :-/

[dbug]

Part nš for oval plug type is 90492061

[Dazzler]

I would change the plugs first and whilst there inspect the HT leads.
If that fails to cure the misfire then its the dispack.

[TheBoy]

Misfire with no fault codes is often HT. If you had oil in wells, you may have cooked the leads

[lcdman]

Just had this with my new (to me) 2.5 V6.  It was a bust HT lead breaking down under load, swapped it out and  - voila - sorted.  

[gaffer]

Thanks for all this useful info - this is the place to come for expertise.  Sadly, it looks as if I still have to get the DIS out, even to change the leads.