i got a pressur regulator and shouldnt the pressure stay up for a while not just drop as soon as the pump turns off and whats that thing ontop of the fuel rail on a 1992 acura integra b18a1 and whats it do.any info will help thanx

 

i got the same problem

 

Yes, the pressure should stay up for at least 5min. 94

 

what could possible cause it to drop off quckly

 

also when i prime the pump, the guage drops to 0 very quickly

 

faulty regulator or pump. refer to the newer post for more info