OE Quality
60-Day Returns

Standard Ignition FJ604 Fuel Injector
Overview of Standard Ignition Fuel Injector FJ604
The Standard Ignition FJ604 fuel injector is designed specifically for Jeep vehicles, including the Liberty, TJ, and Wrangler models. This new MFI (Multiport Fuel Injection) injector ensures precise fuel delivery for gasoline engines, supporting optimal engine performance and efficiency.
- New MFI fuel injector compatible with Jeep Liberty, TJ, and Wrangler
- Gray color housing with durable construction
- Designed for gasoline fuel systems
- Male blade terminals with two connections for secure wiring
- Part number FJ604 for easy identification and replacement
Detailed Product Description
The Standard Ignition FJ604 fuel injector is engineered as a direct replacement for original equipment injectors in Jeep Liberty, TJ, and Wrangler models equipped with multiport fuel injection systems. This injector features a gray body and male blade terminals with two terminals, ensuring reliable electrical connectivity. It is designed to deliver precise amounts of gasoline to the engine cylinders, supporting smooth combustion and consistent engine operation. The injector is new, not remanufactured, providing a fresh component for your fuel injection system.
Compatible Vehicles and Applications
This fuel injector is compatible with the following Jeep models:
- Jeep Liberty
- Jeep TJ
- Jeep Wrangler
It is intended for use in gasoline-powered engines with multiport fuel injection (MFI) systems, making it suitable for restoring fuel delivery performance in these vehicles.
Common Issues Addressed by FJ604 Fuel Injector
- Engine misfires caused by faulty or clogged injectors
- Reduced fuel efficiency due to inconsistent fuel delivery
- Rough idling or hesitation during acceleration
- Check engine light triggered by injector-related trouble codes
- Fuel leaks or injector electrical connection problems
Installation Notes and Tips
- Ensure the engine is cool before beginning installation
- Disconnect the battery to prevent electrical shorts
- Carefully remove the old injector and inspect the fuel rail and seals
- Use new O-rings and lubricate them before installing the new injector
- Verify secure connection of the male blade terminals to the wiring harness
- After installation, perform a fuel system test to check for leaks and proper operation
Quality Assurance and Warranty
Standard Ignition provides this fuel injector as a new replacement part, manufactured to meet or exceed OEM specifications. The FJ604 is subject to quality control standards to ensure reliable performance in Jeep Liberty, TJ, and Wrangler vehicles. Warranty coverage details should be confirmed with the parts provider or manufacturer documentation.
| Brand | Standard Ignition |
|---|---|
| Part Number | FJ604 |
| Color | Gray |
| Fuel Injector Type | MFI Injector |
| Fuel Type | Gas |
| New or Reman | New |
| System Type | MFI |
| Terminal Gender | Male |
| Terminal Type | Blade |
This part fits 6 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2006 | Jeep | TJ | 2.4L | L4 | N/A | Performance fuel injector fits various vehicle makes and models. |
| 2006 | Jeep | Wrangler | 2.4L | L4 | N/A | Performance fuel injector fits various vehicle makes and models. |
| 2005 | Jeep | Liberty | 2.4L | L4 | N/A | Performance fuel injector fits various vehicle makes and models. |
| 2005 | Jeep | TJ | 2.4L | L4 | N/A | Performance fuel injector fits various vehicle makes and models. |
| 2005 | Jeep | Wrangler | 2.4L | L4 | N/A | Performance fuel injector fits various vehicle makes and models. |
| 2004 | Jeep | Liberty | 2.4L | L4 | N/A | Performance fuel injector fits various vehicle makes and models. |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.