Hey guys. I have a real problem. I can't get my 89 jeep cherokee 4.0 to pass smog. Unfortunately I live in Cali. I have replaced o2 sensor, cat converter and muffler. Guy at shop said it could be my egr valve. I unplugged the egr hoses one at a time and it still ran. I read it should sputter when a hose is disconnected. Would it need replaced? Also my nox levels shot up after replacing o2 sensor. All other levels came down. Need some advice.

Heys guys, got a real problem. Just replaced the real main seal on my 89 xj and the leak is still there. Its coming from in between the bell housing and flywheel cover. New to jeeps and could really use some advice.