I got a 5.4 2 valve with about 200,000 miles on it. Its giving me tone of codes- po174,po171,po352,po302. Its misfiring and to be expected taking a lot of gas. The reason I think its the computer is I will change the 2ed coil and it'll run like a charm for a couple days then the misfire will comeback. And will also stop giving me all the codes. Thanks.

 

have you checked the encabulator? they can be finicky

 

It's the non turbo 5.4

 

I forgot to mention that the battery light will flicker on and off every so often, The voltage is good and the battery is only 2 months old.

 

How about a vacuum leak by cylinder #2 and a dying alternator?

 

Battery light flickering when you get on it? It's the alternator going bad...

 

no new alternator

 

short answers bad form. people not help.

new alternator often bad out of box

could be shorted wire

 

Its a new alternator, barebones try to act a little more mature act your age not your iq

 

Actually, I shouldn't even be trying to help. Carry on...