Some maintenance requires a 'driveability test', where you run at idle highway speeds etc for a certain amount of time. I know there's a sequence that's followed for replacing my roomie's Corolla 02 sensor; think it calibrates the new stuff into the feedback loop. Hopefully that's all you need is a little varied driving. <img src="/forums/images/graemlins/cheers.gif" alt="" />

Well, after improving to only hiccuping once or twice in 40 miles of driving, it seems we've taken a turn for the worse. I drove the car yesterday (it's typically the lil' lady's car) and it was awful. I felt a misfire or two at idle (both not there before) and the hiccups were bad in the 20 miles we drove away from the house.

Oddly, it was much improved on the way home but I still think I have more work to do. With the replacement of the maf, the car is back to having it's power. Before MAF replacement, it was starting to hiccup under full power, now it feels strong and smooth under power again so I don't think that was a waste of money, at all.

I'm going to go ahead and throw a new set of plugs on it. Even though I pulled them and they looked great, I want to KNOW i'm not missing something stupid there.

Any suggestions on what logs I should take and post up here? Do you want long and short trim fuel vales when the hiccup occurs? Do you want to see it under full-throttle accel? I know with my audi we generally look at airflow, timing, maybe IATs and boost. Maybe for the 4-runner i'll log airflow, timing, and o2 fuel trims.

Any suggestions are appreciated.