Vacuum leak
Yes that car has a timing belt
yes, most external parts on a 2.8 will fit a 3.1, but not a 3100 V6
The check engine light cannot be retrieved on a 1990 Cavalier unless a problem develops with the engine. The engine can be checked for errors, though, by using a tester that is plugged into the vehicle's computer.
Kind of vague...!! What's it doing? Is it turning over? Was the check engine light on before you shut it off? Need more info.
Cavalier 1985-93 Top of Glove Compartment
The curb weight of the 1990 Chevrolet Cavalier base sedan is 2,444 pounds. The fuel tank holds 13.6 gallons, and it uses regular unleaded gas.
It is on the front of the engine.
185/80R13 for sedans and coupes215/60R14 for Z24 coupe
Try looking on the head, on the passenger side of the throttle body
check and see if you are getting fuel ,spark and compreesion these are the three main things if you have all of these repost
to the left of the wiper motor, a vacum hose and electrical connections are attacted to it
It can mean that this engine is out of time. You may need to have it timed.