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.
Economical. The cost of concrete floors is very low, about $2 to $6 per square foot to polish a plain gray slab, giving it a lustrous sheen. The concrete's tonal differences, subtle cracks and aggregates take on a stonelike, natural feel.irst, getting concrete overlay finish costs about the same as the cost to put in cork or hardwood floors (note you have to use engineered hardwood floating floor if putting over a concrete slab). I paid $10 sq ft. I got quotes for less, but went with the concrete artists that I thought did the best work.