I made several posts trying to figure this out, and I want to post this here because maybe it will help someone in the future as it took me almost a month to figure out. My symptoms are: -Hard start and backfire out exhaust -Fuel smell/fuel inside balance tube and intake manifold -Random misfire/bucking at any given rpm, and gets worse with more load -weird noise around fuel rail when spinning cas by hand
My answer is a bad O-ring or fuel rail seal. I cannot tell which one went bad, but there is my finding! Hope this helps someone in the future !
Follow Ups
Problem solved - Hard start and bucking at random RPMs - TwinTumor18:52:26 12/26/20