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yea i have a 2001 f-150 with a 5.4 n the smaller trans. it has KnN intake with a flowmaster n its lifted on 35s with 355 gears. one day i has driving home go about 75mph n the check enginr light started flashing an it lost all power so i pulled over 2 c what was wrong an it was nothing. an a few week later i stated it n let it warm up when i got n it the o/d light started flashing. does any one know whats wrong with it
You need to have the computer codes read. This will tell you why it lost power and why the OD light is flashing. The O/D light is a transmission fault that could be a shift solenoid, or several other computer controlled items in the tranny. Most autoparts stores like AutoZone will check them for free.
Write down the codes and post them here so we can point you in the right direction. Many times, those store clerks will sell you the wrong part because they do not know what is actually causing the code to come up.