I picked up a little 96 ford for the gas mileage, and to my horror I discover it is subject to a different emission testing standard.... they take the queen bee borg and plug into my car, and read the OBD2 codes... they dont really test for emissions per se, they check to se if the car is "intact" as it came from the factory and working within normal peramiters. there is something really really commie about this but i had to do some reserch and learning... Ive nebr had one quite so "newfangled". a 1965 doesnt have a puter port plug to be anylized... i like that. but it also is a gas hog. now, the little ford i got is suppose to get 35-45 mpgs. and unless all the various computer monitirs and switches are in tact and working ok, it will get about half that. SO, in the interests of maintaining mpgs.... i am forced to evolve. :no: on the surface it looks like a horror show. 5000 codes and 100's of thousands of reasons it doesnt work. but... the check engine light pops on when the first one fails, and if you scan the codes immediately, you know just what made it come on, and if you ignore it it can cause a cascade of failures to keep you busy till hell freezes. this obd2 system the more I play with it is.... kinda cool. it trips up codes for simple stuff like pinched vac lines and worn plugs or clogged injectors I cant hear or feel. I could get to like this.... it took me about 5 min to trace a code back to a stuck vac switch, which cost me 160 bucks, and thats about the only real PITA, is the extream cost of thses parts! any other old car I had, a check engine light could be fixed with a piece of tape over it.... and no ill ever shown for the action. these newer cars you cant do that! ignore a failed sensor and it makes all the other bits and pieces go bad.... and your MPGs go along with them. so, along with my compression tester and vac meter and other tools I take in my mechanics JuJu bag, I have to add an OBD2 scanner, when going to check a used car.... if your going to hunt a used car newer than 96.... get one! plug it in the car before you get to like it to much on the lot... and beware, the car dealers clear the codes when they part the little gems... so get in writing that the check squirrel light wont pop on for at least 30 days.... if they are hoest and didnt clear them, they wont blink. the suggestion of such a warranty will turn a crooked dealer pale. :haha: I found a dealer who said "go ahead do what you like just put it back together". In PA, we have a "lemon law", even if the car says "no warranty", if the window price is over 1000 bucks, the MUST by law warrant the car for 30 days... it isnt an option. the only way they can get around it is mark the sticker AS IS. if it doesnt say "as is" with the "no warranty", be very aware of the seller.... they know better. with your trusty OBD2 scanner and a 30 day warranty, you will at least be ahead of the game. if its a private seller in someones front yard, chances are they dont know how to clear the computer to make it "look good" and your scanner will be even more a help to you.... as the check squirrel light doesnt always come on for all errors it find..... you can discover 20 problems and the light still be off! yep... I might get to like this technology thing. if it wasnt so friggin expensive!! I'm still not selling my 65... :haha: I just aint driving it till I have to haul something.