Just to rule out the ECU, you could send it to @Wranglerfix (wrangelrfix.com) and have him test it for you to rule out whether it's got an issue.
When you get back to the Jeep I'd be curious to know what the fuel pressure is at the rail. That's where I'd want to start just to rule out the most...
hello all,
i’ve put in new spark plugs ignition wires, cap and ignition rotor but it seems like it’s still misfiring and no check engine light. any recommendations or suggestions.
thank you