I have a 1996 Subaru Legacy Wagon with a 2.2L 4 cylinder engine that I have been driving for about a year. When I got it, it had 198,000 miles on it and a slight leak out the valve covers. My mechanic informed me that as long as I kept oil in the car, it wouldn’t hurt to run it like that for a while and that the leak wouldn’t get worse. Well about a year later and 30,000 miles added later the engine feels like it’s failing. Slowly the leak got worse and my mechanic now belives the main leak to be in the front of the engine out the camshaft o-ring and my oil pan is now leaking out the main seal. I know this causses much more significant oil loss and now im putting oil in every morning before I drive it for the day.
Now for the issues. I’ve always had a rough idle that fluctuates between 1200 rpm and 550 rpm. it only fluctuated every once in a moment and It wasn’t caus for concern. But Now it fluctuates a lot and according to the meter on the dash, its hitting 250 rpm and abruptly goes back to 750 (what I think the idle is set for). There is a large dark stain where I have been parking my car for the past year and a half and there is oil leaking all over the engine and its smokes wen I come to a stop. I know it’s not good when it’s doing that. I do wash it off but money has become tight and I’ve lost my job due to car troubles recently.
What it does when I drive it. First off when I start it, it takes a moment to start. Not always but sometimes. Then it’s fine for a little bit. I put it in gear and away I go. Suddenly I notice a loss of acceleration and I have to push the gas pedal in further for it to register. That doesn’t always happen but has become more and more frequent and it does it whether the engine is cold or not. As I cruise down the road, I notice the acceleration problems just keep creeping up. It does try to stall out on the occasion but mostly as I am comig to a stop or when I am waiting in traffic. It’s when I’m waiting in traffic you hear the ide get really erratic with the needle constantly moving from as low as 250 all the way up to 1500 RPM. I do hear a knocking noise and the engine shaking when its trying to stall out. As I stated above, I am a loss as to what can caus this.
I have replaced the ignition coil pack and the plugs and wires . I have bought a new oil pan seal.
Now I do have access to a couple of 2.5L engines from similar subarus of about the same years. Are any of the parts interchangeable between a 2. 5 and a 2.2L engine? like the sensors?