Now running rich

[Randy Hyde]

2000 Expedition 4.6L, 248,000 miles. Had been having problems with #5 cylinder misfire. Put new coil pack on it and it ran better for about a couple hundred miles. Started running bad again and code showed misfire on #5 cylinder. Replaced plug since coil pack was pretty new. Ran good for 100 miles and then after sitting for a week, started up and running bad again. Code showed misfire #5 cylinder. Ordered 8 coil packs, 8 plugs and 8 injectors. Installed all of them yesterday. Test drive today and still idles rough but on the gas it seems to run pretty good with the occasional hickup. Put on code reader at O'Reillys and it read P1152 Lack of heated oxygen bank 2 and P1132 Lack of heated Oxygen bank 1. Will this eventually correct itself or do I need to check injectors and other stuff. I'm not a mechanic but after 5 hours under the hood yesterday, I do feel like I did the install correctly. Any thoughts?

 

[stamp11127]

Welcome to the site. The two codes are telling you the heaters in the O2 sensors are not working. That can be as simple as a blown fuse or problems with the electrical harness or bad sensors.

It will not correct itself.

Engine Performance Wiring Diagrams - sensors are on page 4.

Also check the fuses for the PCM since it controls the heaters in the sensors.