While I do agree on your thoughts for a OBDII scanner more equipped than the pocket one I have, and I do intend to get one down the road. I am more interested at this moment at doing a full hands on tune-up and then go from there in acheiving better MPG. Since the taking off and cleaning the EVAP parts, for some reason the car responds betterat a dead still take-off. That to me seems a little weird being the EVAP would be the least of the areas to make that happen I would think. Or it is my imagination at work, which at my age could be. But it does feel more responsive. And yes wmburns, I do not go about my mechanical business by just throwing parts on a car to see if it fixes the issue. I like to do my homework first. Doing it the other way gets kinda expensive. On that note, I have noticed about 25 MPG more on the tank. I have made 2 fill ups since I fixed the EVAP issue, and still no CEL's. I went yesterday and bought NGK Iridium plugs. Today I took them back and after much reading and write-ups on this very topic of which plug is better, there seems to be much debate going both ways on OEM Motorcraft and NGK Iridiums. But in the end, I took the NGK's back for a refund this morning, and went to Ford parts dept and bought a set of Motorcraft Platinums (OEM) as I do tend to beleive since I am running a stock set-up, why change what Ford intended for this application. I also got a Ford OEM fuel filter while I was there. So today I am going to change out the plugs as soon as the car cools down, and change out the fuel filter. I added some Lucas fuel and injector cleaner also this morning. Before I install the plugs though, I am going to make sure they are gapped correctly too.