I saw the reply, but unfortunately it is not responding to my question. I'm not worried about the car not passing the test on actual emissions. Let me explain. All cars in this area are subject to emissions tests. When a car is purchased as used, it must be E tested before it can be registered to the new owner. Also, most cars must be tested annually or bi-annually to renew registrations. There is not a random sampling for testing here. E tests here consist of two major parts. One is the actual emissions the car is putting out. For older cars like the one I am looking at, the permitted emissions are quite high and are not usually a problem to pass. The other major part is the inspection of the different elements of the fuel and emission systems even including the proper functioning of the gas cap. This second part is my main concern. Although the emissions may be very low and well within limits, the car will not pass if the fuel or emission systems have been altered so that the emissions system "could" be functioning other than as designed. Hence, my question if simply changing the carburetor to one that is not original equipment is a violation of the Clean Air Act. I'm sure the seller of the car I am looking at is not the first guy to swap carburetors since the Clean Air Act went into effect, so there must be some, at least, rules of thumb for doing so. Basically, the question is: Can an other than original equipment carburetor be put on a car that will not put the car in violation of the Clean Air Act? I know this is not a mechanical question, but I believe it is one that experienced professional mechanics should know in the event that one of their customers would want to do so. Are such swaps limited to non public street use vehicles?
I would appreciate a response to this question. I can provide more information if needed. Many thanks.
Thursday, March 5th, 2015 AT 12:52 PM