Not sure if you mean a fuel pump cut off switch that shuts down the fuel in case of an impact.?. But if it is, just look in the trunk, sometimes behind the carpet or molding and you will find the reset. But actually I don't think that car has one, think that is controlled by the ecu.
If you are not talking bout this, then the answer is no...there is not a "kill" or "interrupt" switch.
yes, most external parts on a 2.8 will fit a 3.1, but not a 3100 V6
Vacuum leak
Yes that car has a timing belt
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 LOCATED UNDER THE PLASTIC STEERING COLUMN COVER NEXT TO THE HEADLIGHT SWITCH
185/80R13 for sedans and coupes215/60R14 for Z24 coupe
Try looking on the head, on the passenger side of the throttle body
to the left of the wiper motor, a vacum hose and electrical connections are attacted to it
The 1990 G20 Chevrolet Van fuel relay switch is located on the front of the fuel tank. The relay switch is next to the fuel pump.
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.
Blown fuse, defective fuel pump relay, or a worn out fuel pump.
The fan relay switch is a small box approximately 1 inch square. On a 1990 Chevrolet Cavalier it is located under the hood on the drivers side on the front side of strut tower behind the headlight mounted on the inner fender well. Try tracing the wires backwards from the fan.