Fuel Delivery Issue Redtop

[89_SR20]

Hey guys so I own an S13 SR20det that has a problem. The car runs fine until I hit a bump and suddenly the car will die. But I have checked all wiring and found no issue in that. The car instead suddenly stops getting fuel to the cylinders. all four spark plugs are dry. I run 94octane with an octane booster. stock injectors and fuel rail. I have fuel from the line connecting to the Fuel filter to the rail and I can hear the injectors are all working. but it happens once in a while and I can push start the car. I just dont want to upgrade the entire system to find out that I didn't solve the issue. what would cause a sudden loss of fuel delivery? Fuel Rail, Injectors, Fuel Pressure Regulator? A wire I missed. Any ideas would help.

[OutlawLui]

Stock fuel pump? Sounds like loose pump or pump connections. Dangerous

[89_SR20]

Fuel Pump and all the lines from the tank to the pump and to the filter are all fine that was what I initially thought as well. Replaced the fuel filter and the lines from the filter to the fuel rail.

[ShadowMan]

Well its something with the pump or its wiring, because you hit a bump and your fuel cuts out. Check grounds and the ecu connection, fuel relay and fuses too.

[89_SR20]

But if its the pump why am I getting fuel at the right amount of pressure and hear it prime as well? all connections seem fine unless I am missing a vital ground somewhere. And its never a constant problem. A road by my house is full of bumps and as long as I am in neutral the car wont miss a beat. but around 4000RPM it 25% of the time will cut out