Search the Community
Showing results for tags '1988 jeep'.
Hi, I have a 1988 Jeep Yj 2.5 with the renix computer. My last stop before I drive this thing off a cliff is here. I should have come here first. I hope one of you can help me. I love my Jeep but am so frustrated with it right now. Problem: Jeep is running super rich. I do not think it is ever coming out of closed loop. Points to know: - O2 sensor is recognizing that the jeep is rich. Volts sit between .94V and .99V JEEP RUNS AWESOME. No loss of power. No hesitation. Idles between 900 and 750 - Fuel smell coming from the tailpipe Emissions high on HC and CO Things I have tried: -Replaced o2 sensor -replaced fuel pressure regulator -replaced CTS replaced ISA replaced ECU replaced MAP Replaced MAT checked return fuel line for blockage. Had Head rebuilt. Vacuum was fluctuating and needed new valve guides. Was hoping this was impacting the MAP sensor. Nope I have gone through entire FSM diagnostic tree. The only thing that failed was the MAT sensor resistance never got down to 150ohms. Always stayed above 300. I even paid a mechanic $600 to try and uncover the problem. He confirmed it was not coming out of closed loop. Recommended changing the ECU. Which I did. I hope someone can help. Thank you all in advance. Carlos