wont start on 1998 Kia Sportage

Ive had my fuel pump changed and head gasket done it still doesnt start

Asked by for the 1998 Kia Sportage
Cam and Crank Sensors will not cause bad compression in 3 cylinders. Do a leak down of the cylinders to see why there is no compression, maybe some valve were damaged or worn out. May the head was cracked. Was it pressure checked by a machine shop and properly re-surfaced?
2 more answers , 1 more comment
check the crankshaft and camshaft sensors
what if theres no compression in 3 of the cylinders?
Have the brake switch checked/replaced. When the brake switch goes bad the car wont start.