Originally Posted by Padawan
I've heard of situations where the ECU will read "not ready" or something to that effect. Basically, you just want to drive the car a decent amount before taking it in for testing.
There's something called I/M monitors.
Think the '96-'00 has about 6 or 7.
They're stuff like monitoring catalyst efficiency, O2 sensor readiness, stuff like that.
If you reset the ECU all of that **** "resets" - and takes some mileage & driving to "learn" the data back again.
If you unplug your battery right b4 u go to the inspection station then they'll read all your I/M monitors as not ready and it'll be pretty obvious as to why. They don't take that long to reset - but you have to ask yourself if the CEL will come back on in that time frame.
It's usually anywhere from 20-80 miles, but I've seen 'em take as long as 200 miles for all to ready again.
What they told you was right, there's a whole list of "ways to drive" so your I/M monitors ready faster...but regular driving will ready then eventually too.