Rough Idle, also getting P0171 (System Too Lean) and P0302 (Cylinder 2 misfire). Car was fine until this happened a week ago, no CEL on, and then everything was lighting up, CEL flashing intermittently.
260000 miles, car burns about 1-1.5 quarts of oil per 3k miles. Other than that, this vehicle is and has been rock solid.
I have replaced the EGR valve, but didn't notice any difference in the idle, and driving was still rough. (I also didn't disconnect the battery to clear the ECM, or let it idle for 15+ minutes like people were recommending).
$200 part, so I'm going to focus on cleaning and reinstalling the original EGR valve if possible.
Question is, I saw some recommendations on cleaning either the throttle body and/or the manifold. I didn't know if the Exhaust Gas path back to the EGR valve was likely to clog up, or if that was a straight shot that usually stayed clean. A video of someone cleaning a Mazda P3 (?) showed a completely clogged tube going from the exhaust manifold to the valve.
Anyone know of any resources showing a walkthrough of removing and/or cleaning an exhaust manifold? Or is that unlikely to happen, and I should focus on the EGR valve and retraining the ECM?
260000 miles, car burns about 1-1.5 quarts of oil per 3k miles. Other than that, this vehicle is and has been rock solid.
I have replaced the EGR valve, but didn't notice any difference in the idle, and driving was still rough. (I also didn't disconnect the battery to clear the ECM, or let it idle for 15+ minutes like people were recommending).
$200 part, so I'm going to focus on cleaning and reinstalling the original EGR valve if possible.
Question is, I saw some recommendations on cleaning either the throttle body and/or the manifold. I didn't know if the Exhaust Gas path back to the EGR valve was likely to clog up, or if that was a straight shot that usually stayed clean. A video of someone cleaning a Mazda P3 (?) showed a completely clogged tube going from the exhaust manifold to the valve.
Anyone know of any resources showing a walkthrough of removing and/or cleaning an exhaust manifold? Or is that unlikely to happen, and I should focus on the EGR valve and retraining the ECM?