So, I put exhaust on the 2002 5.3 today. Its been running in the shop on open manfolds somewhat good. Today I installed downpipes and mufflers with an H pipe and dumps just before the axle.
Now the truck is running super rich. As in barely idles. Should exhaust have made such a drastic difference?
How do I upload my scan and tune s you guys can see whats going on?
Thanks,
Jason