Originally Posted by jcain
35 38 38 37 38 39 . swapped to 6510s at 35. idles smoother, accelerates with no hesitations mid rev. will see how mileage suffers.
all my plugs were GROSSLY over torqued from the factory. nearly twice the factory torque specs on one of them.
Did mine this morning, and they were also WAY over torqued as well.
I checked one plug last week and it was spot on .035 so I wasn't sure if I wanted to mess with the rest or not, but I decided to go ahead and do it this morning. Good thing I did, all but the first plug I checked were improperly gapped. .035, .042, .039, .037, .039 .040
Couldn't tell much of a difference at idle and I won't get a chance to take it for a test drive until this evening, but I've got my fingers crossed it helps the shudder.