[bermblaster41]

Yes the tank is vented and I did check for negative pressure on the fuel tank. Check good I drove the cobra home this morning from work nice and cool outside and the fuel pressure stayed at 6 psi. I let it set outside for an hour and the pressure dropped to 3psi[hood closed] when I pulled it into the garage. I just finished the car. It was fast as hell when hood was off and before go cart. Performance dropped when car was assembled just started troubleshooting power loss and noticed fuel pressure low when car was warmed up. Note when driving car before outside temps was fair bit cooler. Thanks Bermblaster