LINUS
Waiting for the Great Pumpkin
The 1fz is stout and I sincerely doubt you have a bent rod. Perhaps clogged up cats due to a large amount of oil being burned??? Regardless, if it's running smoothly, just drive it...
I was thinking the same thing....some of that oil in the cylinders must have pushed down that way & getting that checked isn't too expensive....I just had a backpressure test done awhile ago & it was a whopping $45 bill - all they do is drill a little hole in the exhaust pre-cat, weld a threaded nipple on & screwin a guage, then once they get a read they grind off the nipple & just weld the hole shut. 1/2 HR labor charge was what my receipt for it said. Sure beats replacing cats blindly, esp if they don't need it.
Also, while checking the MAF, I'd expect to see some oil having spit back to the air filter housing & now you might see some clear down in the tuna can. If you have plenty of time, maybe even pull the throttlebody & shoot a load of cleaner through it - can't hurt.
Nothing to do with running issues, but have you made sure no brake fluid ended up on paint, and also if she's running a acid battery, did you hose down any sulfuric that might have come out the breathers?
Once I finally figured out what was causing a weird running condition (part of that cat testing episode) & corrected it, I also was "running weak" the next day, so I undid the battery for the evening to reset the computer - it seemed to need that, as it ran OK (wasn't pushing it though) the day after, then after a couple hours it was back to "full power" - I suppose it re-learned what it needed & that corrected for it, but I have no proof of any sort - I'd simply seen where other people had done this & gotten result. If she's already been driving for a few days, maybe it has corrected itself - I have no clue the memory span in the ECU.