The first step is to remove the 25mm screw holding the plastic covering on the throttle linkage. After the screw is out just lift up a bit and pull towards the front of the car.

         The next step is to loosen the hose. The clamps are 7mm and it is better to use a socket than a screw driver so as no to distort the fastener. Only disconnect the one on the air box and the one on the throttle body.

         Pull the hose off and back, rest it on the Idle Air Motor as shown. The next step is to work the top hose away from the air filter box. Next reach down and wiggle the hose off of the throttle body. On the back side of the hose is the connector that has the flame trap. After the hose is loose, you can maneuver the hose such that you can reach around back and turn the connector about 1/8 of a turn CCW and the hose should be free to remove and clean.

         The "Flame Trap" is inside the connector and this one has a lot of oil and crud built up, if you can't pull it out with needle nose pliers or something similar, then screw, a small screw into the center of the flame trap and use that to tug on to get it out. If the new one seems too tight to go in after you clean the holder, trip the small edges you can see and feel on the new flame trap. You might clean the throttle body while you have the hose off.

         Notice where the hand is holding the the flame trap housing, there is an "O" ring there that should be cleaned and put back in place to ensure a good seal. If the "O" ring is hard and brittle you might want to replace it.

Note that in 1998 Volvo stopped putting the flame trap in the housing, it came from the factory without the white plastic flame arrestor in car. This brings up the question a lot of times is it needed at all in the 1993-1997 models. I've never seen an "official" message from Volvo on this, so what happens at the dealer, if the car came with it we put it in when we do PCV maintenance. Could you leave it out, my guess is yes.