I have a 2000 ford Focus and it has a fuel starvation problem. Last week a new fuel filter and fuel pump assembly was installed. Everything was fine for the first 250 miles. Then the problem started again. I have a scanguage II installed in the car and today I noticed the when I put my foot in it the FPR(fuel pressure) drops down to 7-8 when the fuel starvation occurs. Normally it is in the range of 25-41. So what is the correct range for the FPR? What could cause this problem? This problem has just about broken the bank..