91 YJ stroker overfueling
I recently installed a 4.7L stroker (4.0L block) in my 91 wrangler. It runs very rough at low rpms with little power and backfires through the intake. I have replaced the temp censors in the intake and thermostat housing, also replaced IAC, TPS, Map censor, and fuel pressure regulator. Nothing seems to help. Any suggestions?