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.
We have collected data nationwide to help calculate the average cost of concrete in the US. The following are average costs and prices reported back to us: $6.40 per square foot (4 inch reinforced slab on grade) (Range: $6.03 - $6.76) $8.32 per square foot (6 inch reinforced slab on grade) (Range: $6.88 - $9.75)