Overview of the 1988 Chevy GM Throttle Body Injector 17086090
The 1988 Chevy GM Throttle Body Injector 17086090 is a core component of General Motors’ TBI-220 system used on 1988–1990 Chevrolet and GMC trucks equipped with throttle body injection (TBI). Integrating directly into the throttle body assembly, this injector regulates fuel delivery to achieve the ideal air-fuel mixture before combustion. For classic-truck enthusiasts seeking authentic performance, understanding its specifications and parameters is crucial when replacing or upgrading the Throttle Body Injector 17086090 or installing a Throttle Body Injector 17086090 Gasket Kit.
Key Performance Parameters of Throttle Body Injector 17086090
Below are the critical performance parameters you need to know when evaluating a Throttle Body Injector 17086090 Fuel Injector:
Flow Rate
- V6/4.3L Applications: ≈ 40 lb/hr at 9–13 psi
- V8/5.0L Applications: ≈ 45 lb/hr at 9–13 psi
- V8/5.7L Applications: Two injectors per pod, each ≈ 55 lb/hr at 9–13 psi
These flow rates assume a nominal fuel pressure of 12 psi. A 1 psi increase (from 11 → 12 psi) yields roughly a 4% rise in fuel flow, translating into an extra 8–10 hp on a typical 50 lb/hr injector.
Operating Fuel Pressure
- Factory-Set Pressure: 12 psi (range 10–13 psi)
- Regulator Spring: OEM springs pre-set for 12 psi operation
Maintaining proper fuel pressure is vital: running at 10 psi instead of 12 psi can reduce flow by over 8%, leading to lean conditions under load.
Electrical Characteristics
- Coil Impedance: Low-impedance design, ~1.0–1.2 Ω DC resistance
- Inductance: ~2 mH
- Duty Cycle: Up to 90% safe continuous duty before risk of coil overheating
Low impedance allows rapid current rise, enabling quick injector opening and precise fuel metering even at high engine speeds.
Spray Pattern and Atomization
- Type: Pintle injector design
- Pattern: Broad, conical spray aimed at throttle‐butterfly area
Optimized for single-point injection, this pattern ensures thorough mixing in the intake port and manifold plenum.
Response Time
- Opening Latency: ≈ 1 ms
- Closing Time: ≈ 1 ms
Fast response supports accurate fuel metering across idle, cruise, and wide-open throttle conditions.
Thermal and Environmental Limits
- Operating Temperature: –40 °F to +250 °F
- Materials: Stainless steel internals, high-temperature polymer seals
Durable construction resists corrosion and degradation in the hot engine bay environment.
Compatibility and Fitment
- Engine Fits: 2.8L, 3.1L, 4.1L, 4.3L, 5.0L, 5.7L TBI-220 systems
- Part Number: OEM GM 17086090 (injector pod casting includes two injectors)
When installing a Throttle Body Injector 17086090 Gasket Kit, ensure the gasket set includes base Y-spacer, regulator cover gasket, fuel line nuts, and upper/lower injector O-rings for leak-free sealing.
Best Practices for Maintaining Your 17086090 Injector
Regular Cleaning & Flow Matching
Ultrasonic cleaning followed by static flow testing at 20 psi ensures each injector in the pod matches within 1% of flow, preventing cylinder imbalances and rough idling.
Gasket and O-Ring Replacement
Whenever you service the throttle body injector pod, replace all gaskets and O-rings using a comprehensive Throttle Body Injector 17086090 Gasket Kit to maintain correct fuel pressure and prevent leaks.
Electrical Diagnosis
Use a digital multimeter set to the lowest ohm scale to check each injector’s coil resistance. Values significantly outside 1.0–1.2 Ω indicate a failing coil requiring replacement.
Why Choose Great Light 5 Axis CNC Machining for Your Injector Components
As a professional 5 Axis CNC Machining Factory, Great Light specializes in high-precision manufacturing and post-processing of metal parts, including custom throttle body injector pods and gasket kits. We leverage:
- Advanced Equipment: 5-axis CNC centers for complex geometries
- Material Expertise: Aluminum, stainless steel, brass, and exotic alloys
- One-Stop Service: Custom machining, finishing, and assembly
Whether you need a remanufactured injector pod or custom spacer designs, Great Light delivers OEM-tolerance parts at competitive prices—your top choice for online customization of Metal Parts.
