Hey guys, just recently purchased a 99’ GT with 160k miles on it. Car runs pretty good when cold and not under WOT but after a while starts to bog down worse and worse. Before I took it to a shop near me that only works on mustang, a simple turn off and on would kinda fix it but still not able to run it how it should be. When I took it to the shop they said the sparkplugs, coils, and fuel filter needed to be replaced. I got the car back and ran a little better for like one pull then started...

4.6L 2V 99 GT Bogging down, P071, P074 codes, please help.