Ford Duratec 23 2.3L: Specs, PCM & Maintenance
Ford · Gasoline engine
Duratec 232.3L · Inline-four
The original Fusion’s 2.3L Duratec is a straightforward daily-driver engine: no turbo, port injection and a chain-driven DOHC cylinder head. It delivers its best work with a healthy cooling system, clean intake path and consistent oil service.
Specifications
Architecture
- Configuration
- Inline-four · DOHC
- Block / head
- Aluminium / aluminium
- Installation
- Transverse
- Cam drive
- Timing chain
Fuel & output
- Fuel delivery
- Sequential port injection
- Cam control
- Intake variable cam timing
- Fuel grade
- 87 AKI gasoline
- Fusion rating
- 160 hp / 156 lb-ft
Vehicles & factory output
| Engine variant | Vehicle | Model years | Platform | Factory rating |
|---|---|---|---|---|
| Duratec 23 | Ford Fusion | 2006–2009 | CD3 | 160 hp / 156 lb-ft |
| Duratec 23 · Focus ST | Ford Focus ST | 2005–2007 | C170 | 151 hp / 154 lb-ft |
| Duratec 23 · Ranger | Ford Ranger | 2005 example | Ranger | 135 hp / 153 lb-ft |
Fusion, Focus ST and Ranger use different installations and calibrations. The Ranger row gives the verified 2005 example, not one rating for its entire production run.
Engine controller
| Application | Supplier & family | Hardware / identification |
|---|---|---|
| Fusion · 2006–2009 | FoMoCo EEC-VI / ESU catalogue group | Catalogue groups ESU312/320/412/415/417; read the actual hardware label. |
| Focus ST · 2005–2007 | Ford Black Oak PCM | Ford 2005 guide; different calibration from Fusion. |
| Ranger · 2005 application | Ford EEC-V PCM | OEM engineering-guide identification. |
Match the complete Ford engineering/service number, supplier hardware ID and diagnostic strategy/calibration ID. The same engine size can use different modules; processor names alone do not identify an ECU.
Catalogue entries identify application families, not a guaranteed ECU for every build year. Confirm the installed unit.
Common faults & maintenance
- Lean or unstable idle. Inspect PCV hoses, intake seals and throttle operation; use fault codes and fuel trims to distinguish an air leak from a fuelling problem.
- Ignition wear. Worn plugs or weak coils can produce load-related misfires. Diagnose the affected cylinder before replacing parts.
- Oil and cooling service. Low oil can upset cam control and chain tensioning. Track any oil use or coolant loss rather than topping up repeatedly.
Keep it healthy. Use the Ford oil specification and viscosity for the exact model year. Follow the normal or severe-use schedule for towing, extended idling, dust and repeated short trips; check oil and coolant between services. Diagnose deposits or poor running before prescribing cleaning intervals.
References
| Topic | Source |
|---|---|
| Factory output | Ford 2006 Fusion brochure |
| PCM identification | Ford Module Programming user guide |
| Vehicle hardware applications | Alientech live vehicle catalogue |
| Original engine specifications | Ford 2005 Service Engineering powertrain guide (archived) |
| Engine photo | Duratec 2.3L in a Ford Ranger. Photo: J.C. Fields · CC BY-SA 3.0. Cropped/resized and square-formatted. |
Listed vehicles are selected North American applications. Ratings and equipment vary with model year, fuel and emissions specification. Verify the VIN, engine label and PCM identification before ordering parts or software. Service bulletins describe affected conditions and do not establish a failure rate or current warranty entitlement.
