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The most accurate way to find out, is to look at the emissions label under the hood. If it is a 49-state car it will say something to that effect, like meets "Federal" requirements. If it is a 50-state car it will say meets federal and California requirements, or 50 state requirements or somethin gto that effect.
The EGR system on the later 240s is hard to spot and you would miss it entirely if you didn't look closely. There is a small (1/2" approx) pipe that goes from the rear of the exhaust manifold back around the rear of the engine, and to the EGR valve under the intake manifold. Then the pipe continues to the intake manifold by running under the manifold and then looping up to the right side of the manifold; the side that faces the right hand side of the engine compartment. The little pipe from the exhaust manifold is one of the largest signs. The pipe is approximately the diameter of the heater bypass pipe that comes from the back of the water pump. In fact, it could easily be passed over because it looks so much alike.
There is also the telltale vacuum actuator cylinder with two vacuum lines that go to it. The vaccuum modulator is usually mounted on or around the left hand shock tower, right near the ignition coil. It is a very small cylinder, maybe 2" in diameter. It says "Aisin" on it and has a couple of wires going to it as well, if you're looking for it. I'm not sure if it was 89-, 90- or 91- that had this type of EGR system as an option. This is not the same system seen on the later 940s. The system works in conjunction with the Bosch EFI and IGN systems, and does interface with the engine computer for diagnostic purposes. If you don't look carefully, you'll miss it altogether. The emissions label tells the true story, though. I've got a picture that shows the location of the EGR vacuum unit just below the next paragraph. That unit will be on or around the general vicinity. I've usually seen it only on 91-93 vehicles, but it doesn't mean it was not available. I don't live in or around California, so most of the cars out here aren't 50 state models (but I had one because it was an overseas delivery car).
If the car was purchased in Volvo's overseas delivery program, or in the State of California, it is just about 100% that it has EGR.
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chris herbst, near chicago
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