no fuel pressure after apr install when car shuts off?

[mach1one]

My friend and I installed an aeromotive afpr last night. We noticed that last night my fuel pressure went down pretty quickly after it shut off, and hovered around 10. Today as soon as I cut the car off, it goes to 0. We set base pressure at 36.

I was under the impression that the fuel pressure should stay up for awhile after shutting off. It takes a bit longer to crank since it's got to build pressure back up. I'm still running the stock rewired fuel pump, 255 is on its way. Any ideas?

 

[spendone]

I thought it was normal. Mine sits at zero when the car is turned off. If this is an issue can someone please fill in.

 

[mach1one]

After awhile it should settle to 0, but I didn't think it would happen right away. My friend's settles down much slower. Takes quite a few more clicks than it should to crank it, my starter might be dragging and I'm thinking its the fuel pressure.

 

[spendone]

Yea mine drops down alomst instanly. I have a 190 pump in there, maybe I should rewire it amd check my fuel filter. I know it atleast takes me 2 tries to crank my car over almost everytime. So I take it that I have an issue.

 

[2.4 turbo Hyped]

Your "aftermarket" regulators do not function like the stock regulator does. It is normal for them to "let go" of the fuel immediately after you turn the engine off.

 

[NJdsmguru]

I had this problem with my fuel pressure dropping to zero after immediately shutting car off. Problem solved by replacing the o ring on my walbro w/high pressure fuel line

 

[mach1one]

Thanks, the car is acting more normal now but I'll be putting on a 255 later this week.