So I installed the pump and when I start the car the fuel press is down from 40 to 20 and it stays there so the car wont run.

Anyone had this happen?
I have a FPR should I just try to crank up the pressure or is something else wrong here?

Help.

 

Normally the fuel pressure will rise over what it was on the stock fuel pump....
What fuel regulator are you using ?
Something doesnt sound right.

 

That definitely doesn't sound right. When I put my Walbro 255hp in, my fuel pressure went up about 5-10 psi at the rail, and I had to lower it a bit. This is with a stock rail, and an AEM fpr.

 

It was just low on fuel and I guess since there was no pressure in the system after the install, the pressure was low.

The gas gauge was still showing it had some but I guess it wasnt enough.

Easiest fix ever lol.