How many miles will it take for all of my OBDII monitors to ready? I have driven 200 miles and out of the 6 monitors the only one that is still incomplete is the EVAP or evaporation monitor. I really need this to ready so that I can go for inspection since mine just expired. Car is turbo'd with no cats but has the O2 spark-plug anti-fouler trick just installed since it was throwing a code. I don't know if I should reset it or drive some more but 200 miles feels like a long time for everything not to be ready.

Thanks.

 

up to 240 miles, EVAP still not ready..

 

I was at 480 miles and it still wasnt ready. I read some where it takes about 500 miles but depending on your driving (drive cycles) it may be ready sooner. I went for re-inspection again at 620 miles and passed.

Its better to drive highway above 50mph and maintain your speed (no cruise control) than to do a lot of local driving. I dont know if this is true. but a couple shops i went to all said the same thing.

 

Well I'm at 335 miles now so hopefully it will go away soon enough since my inspection is expired. I was under the impression that it was only around 90 miles, not 600 but at least I'm not the only one. Thanks..

 

So 380 miles and still not ready. Then I needed gas and filled up. Drove the car until 420 miles when I got too my destination and checked again and it was finally ready. Supposedly I've heard with the EVAP monitor is related to the gas tank and sometimes it has to be filled up to read. If your tank is half full then it might not run its tests. Just an idea for any one who might be interested.

I still ended up failing inspection because they did a visual check and saw no cat lol.