hey i got a 2005 f150 super crew lariat 5.4. no mods except airraid intake and a throttle spacer. allso cut off exhaust. anyways, this is a problem truck that i want to fix up and sell. my problem now,{after swapping engine,tranny,computer,cats,starter,and battery] is that my speedo doesnt work most of the times, and allso my temperature gauge goes to zero. 4x4 + 4x4 low. lights flash three times. and my check engine light is on... i noticed when you switch it into gear, it usually works for a second and then goes out... please help!
P.S. going to go scan it at lunch... see if it reads anything