CHEVROLET 91173903 Metro Firefly Injector Port Fuel General M/port

( Brand: Chevrolet ), ( Manufacturer Part Number: 91173903 ), ( Type: Parts ), ( Storedescription: Acdelco Was Founded Over 100 Years Ago And Flourishes On The Inno )

Review CHEVROLET General Motors Pontiac Metro Firefly Injector M/port Fuel New Oem fits 1998–2001

The **1998 2001 Chevrolet/Pontiac Metro Firefly (GM 91173903) Multi-Port Fuel Injector** is a precision-engineered component designed to deliver optimal fuel efficiency and performance for the compact, front-wheel-drive Firefly platform, shared between Chevrolet and Pontiac under General Motors global compact vehicle program. This injector is part of the **EFI (Electronic Fuel Injection) system**, specifically tailored for the **1.6L or 1.8L inline-four engine variants** found in these models, ensuring accurate metering of fuel into each cylinder for a clean, efficient combustion process. Crafted with high-grade materials, including a durable **stainless steel or nickel-plated body** and a **ceramic or glass nozzle tip**, this injector is engineered to resist corrosion, clogging, and wear over extended use, even in demanding driving conditions. The **multi-port design** allows for precise fuel delivery to each cylinder s intake port, enhancing throttle response, reducing emissions, and improving overall engine reliability a critical feature for the Firefly s lightweight, fuel-efficient architecture. Whether installed in a **base SOHC (Single Overhead Camshaft) engine** or a slightly more advanced version with dual overhead cams (DOHC), this injector plays a vital role in maintaining the engine s performance standards while adhering to emissions regulations of the late 1990s. For restoration or replacement projects, this part is a direct-fit solution, ensuring compatibility with the **GM 91173903 engine control module (ECM) and fuel management system**, making it an essential upgrade for enthusiasts seeking to restore stock performance or enhance reliability in their Firefly. Proper installation, along with regular maintenance of the fuel system, ensures that this injector continues to operate at peak efficiency, delivering the precise fuel-air mixture necessary for smooth operation and longevity.

### **Pros and Cons of Buying a 1998 2001 Chevrolet/Pontiac Metro Firefly (91173903, Injector M/Port Fuel System)**

#### **Pros**

1. **Affordability** These vehicles are among the cheapest used cars available, making them a budget-friendly option for those needing basic transportation.

2. **Simple Mechanics** The engine and drivetrain are straightforward, which can make repairs less complex and more cost-effective for those with mechanical skills.

3. **Small Size** Ideal for urban driving, tight parking spaces, and navigating congested areas where larger vehicles struggle.

4. **Fuel Efficiency** The 1.6L or 1.8L engines (depending on model year) are known for decent mileage, often achieving 25 35 MPG in the city and highway.

5. **Availability of Parts** As older, common vehicles, parts are widely available and relatively inexpensive, though some may require sourcing from salvage yards.

6. **Low Insurance Costs** Due to their age and low market value, insurance premiums are typically very low.

7. **No Modern Electronics Complexity** Unlike newer cars, these lack advanced computer systems, reducing the risk of costly diagnostic or repair issues related to software or sensors.

8. **Potential for Restoration** For enthusiasts, these cars can be fun to restore or modify, offering a low-cost entry into classic or compact car culture.

#### **Cons**

- **Fuel injectors** (commonly clogged or leaking, especially in the "Injector M/Port Fuel" system).

- **Timing belts** (often require replacement every 60,000 100,000 miles; failure can cause catastrophic engine damage).

- **Water pumps** (often fail around the same time as the timing belt).

- **Transmission issues** (especially in automatic models, where fluid leaks and solenoid failures are common).

- **Rust** (suspension components, frame rails, and undercarriage are prone to corrosion, particularly in snowy or salted regions).

2. **Poor Safety Ratings** These cars lack modern safety features like airbags (many only have seatbelts), stability control, or crash-test certifications, making them unsafe in collisions.

3. **Discomfort and Durability** The interior is basic, with thin seats, poor sound insulation, and a cramped cabin. The body is also prone to denting and rust.

4. **Emissions and Legal Issues** Some states or countries have stricter emissions regulations, and these cars may not pass smog checks or require expensive modifications to comply.

5. **Resale Value** If you ever need to sell, these cars hold little to no value and depreciate rapidly.

6. **Driving Experience** The ride is harsh, handling is poor, and the engine lacks power, making them uncomfortable for long trips or highway driving.

7. **Fuel System Problems** The "Injector M/Port Fuel" system is notorious for injector failures, leading to rough idling, misfires, or complete engine stalling. Replacing injectors can be expensive.

8. **Electrical Gremlins** Older wiring and switches often fail, leading to intermittent issues like dead batteries, faulty windows, or non-functional accessories.

---

### **Conclusion**

The 1998 2001 Chevrolet/Pontiac Metro Firefly (especially those with the Injector M/Port Fuel system) is a **high-risk, low-reward purchase**. While the upfront cost and fuel savings may appeal to some, the likelihood of **frequent and costly repairs** particularly with the fuel injectors, timing belt, and transmission outweighs the benefits. These cars are best suited for **short-term use, as a project car, or in very specific scenarios** (e.g., a secondary vehicle for a mechanic who can handle repairs cheaply).

For most buyers, a **modern used car** (even a basic 10 15-year-old model with a reliable engine and transmission) would be a far safer and more practical choice. If you re determined to buy this car, **budget for immediate repairs**, prioritize models with **low mileage and a service history**, and be prepared for **frequent maintenance**.

### **Recommendation**

- You have **mechanical experience** and can perform repairs yourself.

- You re buying it **as a project** with the intention of restoring it to a drivable (or even show-ready) condition.

- You re in a **financial position to absorb unexpected repair costs** (expect $1,000 $3,000 in repairs within the first year).

- A **reliable used compact car** (e.g., Honda Civic, Toyota Corolla, Mazda3) with a **known-good engine and transmission**.

- A **hybrid or electric vehicle** if budget allows, for better long-term efficiency and lower running costs.

- A **salvage title vehicle** if you re willing to take on a higher-risk, lower-cost project with proper inspection.

If you proceed with this purchase, **get a pre-purchase inspection (PPI) from a trusted mechanic**, **check for rust**, **test the injectors and fuel system**, and **verify timing belt/water pump condition**. If the car passes these checks, proceed with caution and be ready for repairs.

Details:

Buyer should verify this is the exact part needed before purchasing.

part #: 91173903 prices

• $23.91-$51.19

specifications carfuelinjector:

• for makes: Chevrolet, Pontiac
• for years: 1998-2001
• brand: Chevrolet
• mpn: 91173903
• type: Parts
• storedescription: Acdelco Was Founded Over 100 Years Ago And Flourishes On The Inno

offer carfuelinjector:

• sold: 0
• availability: In Stock
• best offers: True
• started: May 17, 2026
• quantity: 1
• options: Ship-to-home

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• type: Fixed
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• class: Standard
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general carfuelinjector:

• Air Fuel Delivery > Fuel Injection Parts > Fuel Injectors
• condition: New

returns carfuelinjector:

• policy: Returns Accepted
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• rating: 99.7%
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• city: Beaver Dam, WI

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