Ford messed up the gapping on the OEM plugs and this is part of the problem with the Ecoboost shudder at 55-60mph. The spark plug gaps are all over the place from. 035 to. 046 on just one members engine.
At the time of publication, the average cost of concrete for a 400-square foot slab, the typical size for a two-car garage, ranges between $583 and $637 or between $1.46 and $1.59 per square foot. On average, contractors will put in about 13 hours of labor to finish a two-car concrete garage slab.
Dyed or water-based stain concrete floor cost: $3.00 dollars per square foot, This includes one stain color, cleaning, and sealing the concrete. Water based stains are easier to work with than acid stains, less labor is involved helping to lower the cost a little.