fyrfytr33
Member
- Joined
- October 13, 2010
- Messages
- 18
- Reaction score
- 0
- City, State
- Mount Vernon, WA
- Year, Model & Trim Level
- '98 Explorer, 4.0L OHV
So I have a 98 Explorer, 4.0L OHV, VIN X (from Canada), 130,000 mi. Rough idle CEL on and off for a few months. So found a vacuum leak under the air plenum changed the intake gaskets, rebuilt injectors, new plugs. Still rough idle. Checked the IAT sensor, no continuity, replaced. Still rough idle, hooked up my OBDII again and read the codes. P0171, P0174, P0113, P0122, P1504, also, no voltage from any of the o2 sensors. And the fuel trim in all levels is -100%. Checked fuse #6 as the manual says it is for the o2 sensors, no fuse? Replaced the fuse, still no voltage from the sensors, fuel trim unchanged.
Any other ideas? I'm thinking maybe a wiring issue, PCM, all o2 sensors bad. I need some direction here, thank you in advance.
Any other ideas? I'm thinking maybe a wiring issue, PCM, all o2 sensors bad. I need some direction here, thank you in advance.