ecm replacement

Hey everyone, I have a 1999 Jeep TJ 6-cyl. About two years ago the PCM/ECM went out on my Jeep, I replaced it and got it back up and running but ever since then I have had to replace the Idle Air Control Valve every few months. Everything would be fine and suddenly it would just go out. Just...

We have a 1999 Jeep TJ 4.0 4x4. Every since we had the clutch replaced last year, I have been chasing the P0340 code. We have replaced the cam shaft position sensor (OEM), distributor, plugs, plug wires, ECM, fuel pump and exhaust header. I know some of these items shouldn't affect the P0340...