The film takes place the day after the events in Porky's (1981). In the original film, both Mickey and Tim were roughed up late in the film. Both can be seen with cuts and bandages on their faces. In Mickey's case, he is also seen limping and with crutches. All wounds have disappeared the next day.
At least two different snakes are used when the boys want to scare Ms. Balbricker. The snake that Tommy pulls out of the box in the locker room is brownish in color, while the snake that they put into the sewer pipe is a much lighter, yellowish color. Then it returns to the brown color when it escapes into the gym.
At the beginning of the movie it is morning and the beginning of school. It shows Wendy and Tommy in PE class during push-ups discussing Miss Balbrickers habit of going to the bathroom everyday at 5:10. Then it skips the various points during the day in different classes following the boys meeting up after school at the local hamburger stand. Although there is no time reference before first class it stands to reason that the time reference being 5:10 is a goof.
The commentary from all the politicians about the porno flick they were watching is slightly different on the tape than what was originally said.
At the beginning of the film Pee Wee has a 1983 circa Cleveland Indians Cap in his room. Cleveland didn't start wearing that hat until 1979.
A great majority of hairstyles among men as well as the clothing is of the modern 1980's style of clothing and hair and not the correct 1950's style.
While men are watching adult movies in the basement of the courthouse, images appear on a screen, but when the camera cuts back to a view with the projector, the film is actually clear 16mm leader, which only projects white light from the lamp.
Wendy is supposedly 17, but Kaki Hunter was 26 years old at the time of filming. Many actors and actresses have played roles where their character was younger (sometimes much younger) than they are. Case in point, Olivia Newton-John and Stockard Channing in "Grease" were playing high schoolers, but were 30 and 33, respectively, at the time.
When Gloria fakes her death in the cemetery, she can clearly be seen breathing.