2003 Ford Ranger Edge 3.0L with P2198 Code: Rough Idle and Rich Running After Multiple Repairs

Model: 2003 ford ranger edge 3.0 Fault Code: P2198 Posted: 2019-01-22 18:23

I'm currently troubleshooting a 2003 Ford Ranger Edge equipped with a 3.0L engine that is exhibiting a rough idle and running rich, indicated by the OBD2 diagnostic code P2198. I've already replaced the MAF sensor, TPS, intake gaskets, vacuum lines, valve cover gasket, and all associated components. A dry compression test revealed two cylinders at 155 psi and 165 psi, while the remaining four cylinders are within the range of 175 to 180 psi. The vehicle has over 200,000 miles on the odometer. Given this history, I'm wondering whether the low compression in two cylinders could be contributing to or causing the P2198 code. Is it possible for insufficient cylinder compression to trigger a rich fuel mixture and misfire symptoms as shown by this fault code?