The engine may stumble or vibrate, especially when the fuel tank is nearly empty.
The DF‑109 is the heart of the fuel system. If it fails, you’ll see hard starts, loss of power, rough idling, or a “no‑start” condition. Because it’s a sealed unit, most repairs are “replace‑the‑pump” rather than “re‑build‑in‑the‑shop”, but the guide covers both approaches. renault df109
| Parameter | Value | |-----------|-------| | Displacement | 2400 cc | | Cylinders | 90° V8 | | Max RPM | 18,000 (regulated limit) | | Power | ~750-760 bhp (less than Mercedes and Ferrari that year) | | Fuel | Elf | | Lubricant | Total | | Valves | 4 per cylinder, pneumatic valve actuation | | Injection | Direct (high-pressure common rail) | The engine may stumble or vibrate, especially when