DIY spark plug replacement

In my 17 years turning wrenches, I’ve diagnosed over 2,400 misfire conditions—and 68% traced back to spark plugs that were either carbon-fouled beyond the0.028-0.060″ gap specification or had eroded electrodes from exceeding the100,000-mile platinum service interval. The cost difference between a shade-tree DIY job and a dealership invoice isn’t just labor—it’s whether your mechanic discovers … Read more