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98 Legacy GT, with a 95 EJ22 swapped in.

 

Every so often, the engine will just start to misfire and run very rough with no power. If I shut the engine off, then turn it back on, everything is fine again. It started over a year ago, but almost never did it. In the past 2 months, it's done it more often. It does not flash the CEL when this is happening.

 

And since I can't figure the source of this misfire, here 2 other things the engine is doing:

 

When going down a hill, and engine braking, then getting on the throttle, it smokes for a bit burning off some oil. I suspect valve stem seals for this.

It is also using a bit of oil, which could be tied to the valve stem seals.

Edited by Speedwagon

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Bought a Subaru pcv valve today, going to put that in later. Read the codes, had more than I thought. The EJ22 doesn't have an egr, so the light is always on. Read and reset them.

 

301(cyl 1 misfire), 302(cyl 2 misfire), 325(knock sensor), 403(egr), 420(low catalyst efficiency), 1507(idle air control).

 

1507 seems like the only one that could be a cause and not a symptom.

Edited by Speedwagon

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Clear the codes and see which ones come back first.  The misfires and knock sensor codes could be causing your issues.  Manual or Auto?  I had the P1507 and it was related to the Neutral switch (MT).

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Imo. If you ever get a knock sensor code. Inspect the harness. And then replace the sensor and harness if the harness is damaged.

Honestly. They go bad after a while. 95% if people have sucess with cheap 10$ ones.

 

But you NEED that code to go away. That will cause the ecm to add more fuel and retard timing.

Edited by golucky66

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