1990 Chevy Truck Problems
1990 Chevy Truck Problems When a truck becomes almost 20 years old and has more than 150,000 miles on it, a tune-up will probably help, but some new sensors for the throttle body will probably go a long way in making the truck run smoother. It is also probably time for some new brake calipers and brake pads. Throttle Body The 1990 Chevrolet pickup does not have a regular carburetor; a throttle body with sensors is used instead. A computer lets the sensors know when and how much air and fuel to place in the motor, so when these sensors are not working properly, the engine runs rough. There are two main sensors in the throttle bottle that can have a major effect on how well the engine is running. The first one is the idle control sensor, and the second is the temperature sensor. If your engine is running rough, try replacing both of these. The temperature sensor looks similar to a spark plug and screws into the intake manifold close to the throttle body. The idle control se