If you have installed a fuel injection system in your vehicle and are having some initial issues here is a quick checklist to work from to get you started. For some scan tools enter vin 10th l 3rd c 8th k.
Part 1 How To Test The Gm Distributor Mounted Ignition Module
1990 chevy throttle body diagram. If theres a clog or other defect there isnt enough air mixing with the fuel going into the combustion chamber and flooding stalling and poor fuel economy are the result. One of the remans went bad. The throttle body has a throttle position sensor that communicates the current position of the throttle to the cars engine control unit ecu. 1 for access to the idle stop screw pierce the cap with an awl and carefully pry the cap from the side of the throttle body. The chevrolet throttle body which is a part of your cars air intake system is located between the air filter box and intake manifold of the carit consists of a butterfly valve called the throttle plate which regulates the airflow intake of the car. Bought two which i put in a new chevy 350 crate engine with 7000 miles on it in a 1900 k2500 pickup.
This diagram is for 1990 92 f body camarofirebird speed density tpi 1990 92 31l v6 mfi camaro firebird vacuum diagrams above picture shows some of the various vacuum lines and fittings youll need to complete your set up. I walk you through how to rebuild a gm tbi throttle body assembly common to 87 95 gmc and chevrolet pickups among other gm vehicles. Block diagram acronyms individual components and their function schematic diagram the actual installation theory and modes of operation calibration equipment variables the subject of this session is throttle body fuel injection. Lesson learned dont waste your money on reman injectors. Easy to use parts catalog. Rockauto ships auto parts and body parts from over 300 manufacturers to customers doors worldwide all at warehouse prices.
What is covered here is generally applicable to most tbi systems but we will be putting particular. Id rebuilt the throttle body and installed remanufactured injectors in it when the new engine was installed. Throttle body assembly as you can see from the above diagrams compared to a carburetor the tbi is much simpler in design. Hitting the gas should open the valve in a throttle body unit for chevy c1500. Access our free throttle body injection tbi repair guide for chevrolet full size cars 1979 1989 through autozone rewards. 1990 chevrolet c70 kodiak 60l 366cid v8 throttle body rockauto.
The injectors are designed to allow possible fuel vapor to rise to the top and dissipate through a channel to the return line which the pressure is controlled through the regulator. If you have access to a scan tool use a hook up for a 1990 350 cu.
Gallery of 1990 Chevy Throttle Body Diagram
