IS250DIYER

So I've had intake and a full exhaust on my car for a while but up until a week or two ago after I put headers on the car started to be very boggy and be a little lean. Sometimes it would shut off when it was idling for a little while in my fuel line seals like it vibrates and you can hear it pulsating under the car buy the rear seats I took the pump out checked it out and comes gas it works turns on but sometimes car won't start and I have to start it with starting fluid then it will turn on and run and idle just fine I have 600 PSI for the fuel on idle my downstream O2 sensors are both Bosch which I know suck but I have to get something and that's all the parts store had at the time and I figured at least works I'm looking for suggestions on what it could be why my car doesn't want to start sometimes and when I give it wide open throttle it builds pressure up to about 17 1900 in right about Redline at 6 or 65K RPM the car cuts out and the fuel pressure drops to like 10. I'm wondering has anybody had fuel pump or fuel pressure regulator problems and what the symptoms were I don't know why my gas line is vibrating and it sounds like it's hitting the car underneath I'm going to check and see if I have a bent gas line or something somewhere but I've took a little look before and haven't seen much. any help is appreciated

2013FSport

iTrader: (2)

Did you put the headers on or someone else?
Maybe they pinched the line?

However, that doesn't explain the no start. At the tanks fuel pump there is the sock and internal to that a charcoal like trap. I suggest replacement as the best option. Start there and see if that helps as your HP pump seems to be starving.

350 cold start goes to 2,200 psi IIRC.
Warm idle 580psi
Redline 2,100 psi

IS250DIYER

I put the headers on myself. My fuel psi also climbs to 1600 after i shut the car off and u can hear a thunk like old water heater pipes in a house.