jscusmcvet
Adventurist
Thank you brother. I will give it a try and report back. To be honest, I love the 4.7 in this platform... Crazy power to me (coming from the jeep world for the most part) and we have "plans" to keep this thing for a long time... so I am going to follow your advice and try it. 93 otane 24/7 here we come and we'll see what happens. Small investment in the big picture.Yes. Changing fuel quality (variable octane) is what the computer is sensing and trying to compensate for, thus throwing CEL's. One of the 3 reasons I did not want to go Toyota V8 when doing the engine swap. This may even be showing codes for the O2 sensors as well because of the erratic burn conditions. Stick with high octane and you may very well see the codes eventually clear themselves after a few consistent performance drive cycles.