spark plugs on 1990 Mazda B2200

i changed the spark plugs to my truck 90 2.2l. now it runs rough, everytime i put it into gear it turns off. its a 5 speed. what should i do ?

Asked by for the 1990 Mazda B2200
be sure the plugs are gapped right, the don't always come out of the box with the right gap. Also go back and double check plug wires are on the correct plug and in good shape. Boots are tight and fully installed over the plug.
thank you , that was very helpful. i did that and now its running great.