Andys04f350
New member
I put in the upgraded blue spring in my 04 a couple months back. No that its getting colder out the fuel pressure is getting high. Cruising on the highway it reads 95-100 at 60-70 miles an hour. If i stand on it full throttle it will drop down to 80-85. If i read correctly before, fuel pressure should be 65-75 with the blue spring upgrade?