[wesleywise33]

I can not figure this out!! i have changed all 4 o2 sensors changed plugs and ran seafoam through it still getting codes and blowing blacksmoke really bad I'am lost

 

[wesleywise33]

Sorry it is a 4.7 engine

 

[jdb1937]

blowing black smoke means either checking emission control equipment: ie PCV valve and EGR and then checking engine compression. One of those should reveal your problem.....

 

[gramol]

have to get it on a scan tool............check fuel trims..........o2 voltages...........temp sensor voltages...........YOU have to see what the computer sees..........otherwise it's a very expensive guessing game........