I recently bought a aem fuel rail with a aem FPR. Im boosting my car and is almost done. Its a jdm b16 sir2. Had FIC 525cc injectors, walbro fuel pump. I installed a b&m gauge on the fuel rail. I cant start the car yet cuz its not done but i primed the car to see an fuel leaks and non. But my Fuel pressure goes to 40psi and than drops down tp 0 when the fuel pump is done priming. No fuel leaks or anything. I teflon taped the gauge. Is this normal? Ive read somewhere that the AEM FPR is common for this. There is fuel going thru the rail i know that. Does anyone else have this problem?

 

Yup, its normal, nothing to be worried about...my aem does the same..its part of the design..no worrys

Happy Boosting

 

Ok thanks. Just dont want a problem when i start the car when its ready.

 

When I ran my aem gauge and aem fpr with my walbro mine would hold @ 40psi for a while before the pressure dropped off @ priming, and after a run.. Double check your pump, and make sure the clamps for the fuel line in the tank are clamped tightly..

 

Newer or older FPR? Ive had mine for 5 years, it has from day 1 always bled pressure after the engine is primed. It works 100% flawlessly. I "heard" newer AEM FPR's wont bleed the pressure however the original units to my knowledge have "always" bled after the prime..... It is nothing to be worried about.

 

Actually it was the older fpr,ran it like 4-5yrs ago then it took a crap on me..