the car ran great until yesterday. the fuel pressure has been at 48 psi since 3 months ago when i installed the bbk 255 pump. last night and today after i ran the car for atleast 40mins the psi dropped and bounced from like 18-25 and barely stayed running. how do i test the relay and what else could cause this problem

 

[quote=johnny89345;4659981]the car ran great until yesterday. the fuel pressure has been at 48 psi since 3 months ago when i installed the bbk 255 pump. last night and today after i ran the car for atleast 40mins the psi dropped and bounced from like 18-25 and barely stayed running. how do i test the relay and what else could cause this problem and also ive noticed the feul pressure drop sometimes pretty fast after i turn the car off from 50. sometimes it stays their though. could the injectors be sticking? how do i test them.