As i have posted, i have a rescue 98 Legacy Outback Limited that survived a skipped timing belt. The car has 132,455 mi. Although i have messid with a few ej25d's, did head gaskets on one, this is the first one that i will be driving as my other example has ej22e heads on it (98 forester)
1. what is compression for 1998, and what octane fuel should i use. The car ran much better with octane boost until i could replace the knock sensor.
2. Does the car have 100,000 mi plugs from the factory? Are platinum plugs appropriate. I suspect the plugs have not been changed at all. NGK v power or copper for this one? Car runs great, but it seems like it should have a little more snap.
3. Even with the new knock sensor, the car does seem to hunt around for timing. I used a universal replacement with a universal pigtail from the NAPA Echlin brand. I could have ordered in ALTROM (oe supply paraut) but i needed the part right away to clear emissions.
4. Is there, or can there be an ECU flash update, as if there had been any TSB's or firmware updates since the time of manufacture?
Also considering a few other things with this engine:
I had changed the oil with Mobil1 0w40 'european formula'. I somewhat wish i had used mobil's 'turbo diesel' 5w40 in regards to the flat tappet cams, but the 0w40 does have good ZDDP content (1000 ppm phos, 1100 ppm zinc, whereas the 5w40 is i believe 1200) and is more than the 5w30 and 10w30 blends.
This engine has the 'football' air intake with a snorkus on it, and one near the MAF. I don't like it as it looks ugly and is in the way of poking around under the hood. Would there be any harm with retrofitting an ej22 intake without the football?
Everything else seems to be in good tune, with regard to a replace mentrear cat and catback exhaust pipe, no codes after clearing the knock sensor.