[rockwood84]

one of the crankshaft sensors is behind the harmonic balancer[the big pulley at the bottom] it could have taken a hit from the belt or could have been bump when the work was done. is the tach working? usually when this one is bad or a loose connector it messes up the tach. sometimes it won't crank and run.if i remember this one is the 24x .there is one more that is on the backside of the engine [ 7x] that will make it miss as it works with the module.but check the connector behind the harmonic balancer for a loose connection first.let us know what you find....