The car is a 1992 LT-1 with LT-4 intake and heads; it also has the original 1992 LT-1 Fuel Rail.

I installed a new Aeromotive AFPR a few months ago. Apart from the fact that the fuel return line now sits about half an inch lower (requiring modification to the bracket), everything worked just fine, base fuel pressure set to 43psi.

I was running without the supercharger at the time; and just recently, I put the supercharger back on (12psi). I took the car for its first WOT run a couple of days ago, and fuel pressure raised nicely (reached about 55psi) with boost. After the runs, I could smell gas...

The AFPR had sprung a fuel leak at the point the return line connects to the AFPR. I removed the AFPR and compared it with a stock FPR - and the Aeromotive unit has a deeper recess for the fuel return line.. this means that the 'o' ring behind the return line 'lip' does not get compressed fully by the 'cap' that retains the return line.

I fixed it today; basically I added a secong 'o' ring between the lip of the return line, and the 'cap' - the recess in the AFPR is deep enough to hold the second 'o' ring in place and the two rings working each side of the lip create a good seal.

I apologize for the explanation, I hope you can follow it.. also I have no pics (I was in a hurry to fix it). However, one of the following is possible:

1. The install requires 2 'o' rings and I mis-read the install instructions
2. The single, 'loose' o-ring approach is good to hold normal fuel pressure
3. ?

Has anyone had a similar experience?

Thanks, I hope this is useful. Andy.

 

Fuel leaks shouldn't be taken lightly. Look at what a leak did to my 96 in March.

Jake