I find this interesting because I just changed my plugs; the last set were installed at a shop, and I did them myself this time to save money.
.035 gapped plugs went in (as specified), but the ones that came out (installed years back by a shop) were gapped at .050 ...
Any ideas how that larger gap would have affected performance? Jeep ran OK, but mileage wasn't all that great ...
I have to wonder if it's been running incorrectly gapped plugs all this time, or if they've just worn out to the point the gap is now that large.