ok, bought a 97 XJ in an auction. She had 77K on the speedo. Initially, she was a rough start. She had a code for crank position sensor and one oxygen sensor. I changed the crank position sensor and both oxygen sensors. I also put new plugs, wires, cap and rotor in.
She doesn't hesitate to start now, she starts right up (small win). However, for the first week, everytime i started her, she would choke a little until she felt like she backfired (without the noise) and then she runs fine. Even when warm, i can shut her off and restart her and she goes through this cough process again... then all is normal (no relation to cold or hot). This morning, I had the same issue combined with a new issue, a high idle that wouldn't drop below 2K until she did her usual cough (which took longer today), and then driving was normal again.
I cleaned the throttle body, put cleaner in the tank and I still seem to have the issue. No CEL since replacing O2 and crank sensor (WTF). After reading everyone's other idle problem posts, i'm thinking faulty vacuum, iac or fuel pump pressure issues. If this was the case, wouldn't the CEL light up? if so, it kind of places my focus on the fuel pump or vacuum... trying to place my focus where it makes the most sense and no code is really throwing me off, anybody ever see this? Where should I go from here? all experiences and wisdom shared is appreciated!
She doesn't hesitate to start now, she starts right up (small win). However, for the first week, everytime i started her, she would choke a little until she felt like she backfired (without the noise) and then she runs fine. Even when warm, i can shut her off and restart her and she goes through this cough process again... then all is normal (no relation to cold or hot). This morning, I had the same issue combined with a new issue, a high idle that wouldn't drop below 2K until she did her usual cough (which took longer today), and then driving was normal again.
I cleaned the throttle body, put cleaner in the tank and I still seem to have the issue. No CEL since replacing O2 and crank sensor (WTF). After reading everyone's other idle problem posts, i'm thinking faulty vacuum, iac or fuel pump pressure issues. If this was the case, wouldn't the CEL light up? if so, it kind of places my focus on the fuel pump or vacuum... trying to place my focus where it makes the most sense and no code is really throwing me off, anybody ever see this? Where should I go from here? all experiences and wisdom shared is appreciated!
