Hi from East Texas!

I am from east texas and have owned my 2007 Frontier XE since day one! Just had a valve job done after having it jump time while replacing the Campostion Sensor and the Crank position sensor. Still wont start. I am here looking for help. I literally parked the truck after having some starting issues, replaced the sensors with NISSAN sensors and then it jumped time due to slack in the timing guides. Dealership wanted $5000+... replaced myself and now back to square one. No spark, but plenty of gas... Any help would be great! Thanks in advance!