I put my 99 4.6 in a 2002 v6 car. It's been a long process with problems at every turn. Last week I finally got it running only to find a crack on my intake. Replaced it with the new better than Dorman intake from Ford. Started it let it idle only to find out my low speed fan is not working. High speed is working. I plugged my tuner in and turned the temps down for activation as to mot overheat my car. I put 12 volts to the fan it works. My scanner tells me the low speed is on but its not. I replaced the ECT and the plug for it. When it's time for lowspeed to come on the car reacts but its not on. New a/c compressor not charged yet so I haven't seen if it comes on with the ac running.