How does the Chevy throttle body injectors work?

by Lee Sallings. The throttle body injection system used by Chevy was a natural progression from the carburetor previously used. Pressurized fuel is strained through screen-type filters before it is introduced into the engine through a pair of injectors located above the throttle body’s venturi and throttle plate.

How many GMC trucks have throttle body injection?

New and Remanufactured Throttle Body Assemblies for 305, 350, 454 Chevy, GM, GMC Trucks, Cars, Vans and 6 Liter and 7 Liter Trucks. Serving our valued customers for over 30 years.

Who is throttle body injection in Largo Florida?

ThrottleBodyInjection.com is a division of Guaranteed Carburetors of Largo, Florida. We are a trusted name for over 30 years in the remanufacturing of OEM carburetors and fuel injection systems for both the automotive and marine industries.

Where is the fuel line on the throttle body?

Locate the fuel lines attached to the back of the throttle body. The smaller of the two lines is the fuel inlet line. Find the fuel service port: it will be located a few inches away from the throttle body on the inlet line. Screw the gauge assembly from the cleaning kit onto the service port.

What was the year of the Chevy TBI throttle?

1987 1988 1989 CHEVY GMC TBI THROTTLE BODY TRUCK / SUBURBAN w/7.4L / 454c.i. V8. If you are not sure about your application please don’t hesitate to contact our sales/tech dept by emailing us and we will gladly help you.

Where is the throttle body fuel pump located?

As you’re already aware, the throttle body fuel injection system on your 1987 to 1995 4.3L, 5.0L, or 5.7L pickup (or SUV) uses a low pressure (12 PSI) electric fuel pump located in the gas tank.

What kind of car was the Chevy TBI in 1987?

Amazon.com: 1987 1988 1989 CHEVY GMC TBI THROTTLE BODY TRUCK / SUBURBAN w/7.4L / 454c.i. V8: Automotive

Where are the fuel injectors located on a Chevy?

Pressurized fuel is strained through screen-type filters before it is introduced into the engine through a pair of injectors located above the throttle body’s venturi and throttle plate. Over time, varnish and sediment clog the screens and injectors, causing inefficient fuel atomization.

What to use to clean throttle body injectors?

Wipe up any gasoline spilled on the engine, when attaching the hose to the fitting, to prevent fire. Screw a can of pressurized injector cleaner to the gauge assembly can tap and open the can by turning the thumbscrew all the way into the can then all the way out.

How to troubleshoot your TBI fuel injection system?

Troubleshooting your TBI Fuel Injection System Most of the problems encountered while installing your fuel injection system or after a time of operation are very simple. If your check engine light is on you more than likely have a hard fault meaning something is grounded out, unplugged, operating out of range or has gone bad. See

What are the inputs to the fuel injection system?

The inputs are: O2 Exhaust Gas Oxygen Content Sensor, ECT Engine Coolant Temperature Sensor, MAP Manifold Absolute Pressure Sensor, TPS Throttle Position Sensor, Vss Vehicle Speed Sensor (not always used), and the Knock Sensor whose signal is conditioned by the ESC Electronic Spark Control Module before reaching the ECM.

Where can I get a new Chevy Tahoe throttle body?

Our wide selection of OE-grade throttle body replacements for Chevy models like the Tahoe, Spark, and Traverse are competitively priced and made in world-class facilities by industry veterans. Find the right part based on your needs and preferences with our user-friendly website. Shop now!

Do you need a tachometer for fuel injection?

Use of this section may require a digital voltmeter, test light, fuel pressure gauge, timing light, tachometer and/or a diagnostic scan tool. If you are familiar with vehicles and how they are serviced you should be able to work through this section with no issues.

Is there a Chevy GMC 350 throttle body?

Chevy GMC 350 Throttle Body This is a Brand New, Genuine GM, Throttle Body with injectors. This fits 91 – 92 Chevrolet & GMC Pickup Trucks and Vans with the 5.7L (350) engine. See below for specifics. This may work for other years and Trucks as well. The OEM part number for this is 17112508. The AC Delco number is 22-3822.

How do you clean a Chevy TBI fuel injector?

How to Clean a Chevy TBI Fuel Injuctor. Spray the injector or injectors with throttle body cleaner, and gently clean the exterior and the tip of the injector with the brush. Do not insert any metal objects into the tip of the injector, as this will enlarge the nozzle tip, permanently damaging the injector. Replace the air filter assembly,…

Is there an injector pulse while cranking the engine?

The engine will run if you either spray starting fluid down the throttle body or hook up a remote start switch. If you use the key, there is no injector pulse while cranking. As you let go of the key and return it to the run position, the injectors give one squirt.

When did GM start using throttle body injection?

So Just what is TBI, stands for Throttle Body Injection used by GM in the early 80’s through 1995. The early systems from 1982-1986 are just too old to do much with. 1987-1991 were still SLOW computers with tiny chips limiting what can be done with the system.

What should I do if my throttle body is bad?

As a part of your regular service intervals, include the air induction service and fuel injection flush to clean out any carbon deposits and dirt. You will need to have the check engine light shut off by a qualified mechanic.

What did throttle bodies do in the 1980’s?

Back in the 1980’s Detroit’s auto manufacturers were transforming all there engine platforms to direct port fuel injection which included an entire array of new components such as fuel injectors, air intakes, mass air sensors and throttle bodies.

What does the throttle body do in a fuel injected engine?

In many fuel injected engines, the throttle body is the portion of the air intake system that regulates the amount of air flowing into the engine, in reaction to the driver… Pro Series™ Throttle Body by Skunk2®.

Can a OE throttle body be replaced with a performance unit?

Replacing the OE throttle body with one of our performance units will not only further enhance airflow for a gain in horsepower, but you’ll also get better throttle response as well. The throttle body houses one or two plates that open to allow airflow into your engine when you step on the accelerator.

When to replace a Chevy c1500 throttle body unit?

AutoZone carries replacements to restore your confidence in your truck. Hitting the gas should open the valve in a throttle body unit for Chevy C1500. If there’s a clog or other defect, there isn’t enough air mixing with the fuel going into the combustion chamber, and flooding, stalling and poor fuel economy are the result.

Is the General Motors Rochester throttle body OEM?

The General Motors Rochester Throttle Body (TBI) is OEM original equipment. Each TBI comes complete with injectors, TPS, air control valve, and throttle body bushings. Every TBI will be Flow Bench tested, calibrated, and idle adjusted making it ready for easy installation. Each TBI has a complete one year warranty.