Join Date: Sep 1999
Location: Vancouver, Washingon
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Re: Emission years
For the most part, 1979 and older 1/2 pickups with the 49 State Federal emission package would not have a catalytic converter. For the most part, 1980 and older 3/4 pickups with the 49 State Federal emission package would not have a catalytic converter. For the most part, most 1982 and older pickups with the 49 State Federal Emission package did not have a smog pump. For the most part, pickups starting in 1975 and newer will have a charcoal canister. For the most part, 1972 and newer pickups will have an EGR valve.
If I had to pick a truck that was going to be easy under the hood as far as the 49 State Federal emission package, I'd look for anything from 1974 and older.
In some cases, I've seen vehicle owners that will stuff small ball bearings in the vacuum lines next to emission equipment, which I guess looks OK for underhood inspections. [img]images/graemlins/blush.gif[/img] I guess a ball bearings inside a vacuum line is not as easy to spot on an inspection like a golf tee or small screw pushed into a disconnected vacuum line. [img]images/graemlins/confused.gif[/img]
As far as a vacuum lines go, usually just a ported vacuum line to the distributor vacuum advance is needed, but maybe a main vacuum line to the power brakes would be a good idea also.