[Blown 5.0]

03-04 mustang with 54 thousand on the clock, Woman driver complaint, car will run fine till it gets hot and or low on fuel. car was taken to well know shop to be diagnosed, OBD 2 said missing on no 5 cylinder, system running lean on left engine bank. Shop recommend plugs, wires, filter, general tune up, 350 to 400 dollars. Car was brought to other shop, found fuel pressure to not be what it should be at idle and under accelarateion. Problem was carefully diagnosed, checked fuel pump driver for proper fuction, checked fuel rail sensor for proper fuction, all was working fine. (The pump could not be fooled into making any extra pressure,) Tank was removed and found that when tank was assm. at factory silcone was used on the vent tubes, we all know what silcone and gas does. This pitucular car had two filters in the tank, both were stopped completly up. Whole tank and pump assm. was replaced,problem solved. Dont know if the cobra was put togather like this or not, but maybe give you some idea what to look for.