The Ford JTJB is a 1,998 cc, inline-four turbocharged petrol engine produced between 2021 and 2024. It forms part of Ford's EcoBoost Gen-3 engine family, featuring direct fuel injection, twin-independent variable cam timing (Ti-VCT), and an integrated exhaust manifold. In standard tune, it delivers 147 kW (200 PS) and 320 Nm of torque, balancing high performance with improved thermal efficiency and emissions control.
Fitted to models including the Focus ST, Puma ST, and Kuga ST-Line, the JTJB engine was engineered for sport-oriented driving dynamics and responsive throttle delivery. Its compact turbocharger and revised intake system enhance low-end torque, making it ideal for hot hatch and performance SUV applications. Emissions compliance is achieved through a close-coupled three-way catalyst and gasoline particulate filter (GPF), enabling Euro 6d-TEMP compliance across all production years (UK VCA Type Approval #VCA/FORD/8912).
One documented concern involves intermittent high-pressure fuel pump (HPFP) rail pressure fluctuation, noted in Ford Service Action 22B07. This issue arises from early-design pump plunger wear under sustained high-load operation, leading to lean mixture faults and reduced power. From mid-2023, an updated HPFP with reinforced plunger coating and recalibrated fuel map was implemented to improve durability and consistency.
All production years (2021–2024) meet Euro 6d-TEMP emissions standards (UK VCA Type Approval #VCA/FORD/8912).
The Ford JTJB is a 1,998 cc inline-four turbocharged petrol engine designed for performance applications (2021–2024). It combines direct injection with twin-independent variable cam timing (Ti-VCT) to deliver strong mid-range power and agile throttle response. Engineered to meet Euro 6d-TEMP standards, it balances sporty character with regulatory compliance in compact and mid-size platforms.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,998 cc | |
| Fuel type | Petrol (Unleaded, 95 RON min) | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 87.5 mm × 83.1 mm | |
| Power output | 147 kW (200 PS) @ 5,500 rpm | |
| Torque | 320 Nm @ 1,750–4,500 rpm | |
| Fuel system | Bosch HDEV6 direct injection (up to 350 bar) | |
| Emissions standard | Euro 6d-TEMP (2021–2024) | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single-scroll turbo with electronic wastegate control | |
| Timing system | Timing chain (front-mounted) | |
| Oil type | Ford WSS-M2C949-B (5W-30) | |
| Dry weight | 132 kg |
The JTJB delivers strong mid-range torque ideal for spirited driving but requires adherence to 15,000 km oil change intervals to prevent turbocharger and timing chain wear. Ford WSS-M2C949-B (5W-30) oil is essential due to its thermal stability and protection against turbo coking. High-pressure fuel pump degradation under sustained load increases risk of lean misfire, particularly in performance driving cycles. The gasoline particulate filter (GPF) necessitates regular highway runs to support passive regeneration and avoid clogging. Post-2023 models feature revised HPFP hardware and calibration per Ford SIB 22B07, improving reliability. Use of 98 RON fuel enhances knock resistance and allows full power delivery.
Oil Specs: Requires Ford WSS-M2C949-B (5W-30) specification (Ford SIB 22B07). Supersedes ACEA C5 and API SP.
Emissions: Euro 6d-TEMP certification applies to all 2021–2024 models (VCA Type Approval #VCA/FORD/8912).
Power Ratings: Measured under ECE R85 standards. 147 kW output requires 98 RON fuel for optimal performance (Ford TIS Doc. WSA-2021-JTJB).
Ford Technical Information System (TIS): Docs WSA-2021-JTJB, SIB 22B07
VCA Type Approval Database (VCA/FORD/8912)
SAE International: J1349 Engine Power Test Code
The Ford JTJB was used across Ford's CD4 and C2 platforms with transverse mounting and shared architecture with Volvo for certain European performance applications. This engine received platform-specific adaptations-reinforced engine mounts in the Focus ST and revised intercooler routing in the Kuga ST-Line-and from 2023 the facelifted Puma ST adopted the JTJB variant with enhanced cooling and GPF monitoring, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front face of the cylinder block near the starter motor (Ford TIS WSA-2021-JTJB). The 8th VIN digit indicates engine type ('X' for JTJB series). Pre-2023 models have gloss-black valve covers with red ST lettering; post-2023 units use updated casting marks. Critical differentiation from JQMA: JTJB has turbocharging and higher output, while JQMA is naturally aspirated hybrid unit. Service parts require production date verification—high-pressure fuel pumps before 06/2023 are incompatible with later units due to internal redesign (Ford SIB 22B07).
The JTJB's primary reliability risk is high-pressure fuel pump degradation, with elevated incidence in vehicles subjected to frequent high-load operation. Internal Ford quality reports from 2023 indicated a significant number of pre-2023 units required HPFP replacement before 90,000 km, while UK DVSA data shows increased lean-mixture-related MOT failures in performance variants. Aggressive driving and delayed oil changes increase turbo and GPF stress, making maintenance adherence critical.
Analysis derived from Ford technical bulletins (2021-2024) and UK DVSA failure statistics (2022-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FORD JTJB.
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