I have a 2004 Mercury Sable with the V6 3.0L DOC Duratec engine. I've been having misfire problems off and on ever since I purchased it, used, in 2011. The misfires are most apparent when the engine is under load (going up a hill) or I'm trying to accelerate.
I've switched out ignition coils from time to time in the past, which often clears up the problem temporarily, but it seems to always eventually return. It does seem to be much worse in rainy weather, by the way.
I'd like to know what the resistance specs are for the primary and secondary circuits on the coils, so I can check that out on the ones I have installed, as well as on a couple cheapies (15) I ordered from Amazon. Also, I have no idea what the range of "good" readings is for those specs, if you happen to have that information.
Thanks so much for any assistance you can offer on this!
have the same problem?
Wednesday, August 24th, 2016 AT 12:11 PM