just replaced the fuel pump and car still will not start

Question

I have a 2004 Nissan sentra 1.8l. It will not start. thought it could be the fuel pump as it has been hard starting for some time. a code reader does not detect a problem with the pump. replaced it anyway and car still will not start.

Answer 1

do you have fuel pressure? 

why did you replace the fuel pump?

I would check compression common problem is a bad head gasket, if the car does not start