Engine Overview and Common Failures
The weight of the 7A-FE engine according to the catalog is 130 kg. The engine number 7A-FE is located to the right of the exhaust manifold. Lean Burn series engines. Many service technicians do not recommend dealing with fuel-efficient Lean Burn engines. They not only require higher quality fuel and use platinum spark plugs, but also suffer from mid-range throttle response issues that are very difficult to get rid of. Noises under the hood. Although these engines do not have characteristic malfunctions, one should still be noted. After 100,000 km, there is often a knock on the piston pins, there are enough complaints on the forum. However, before digging into the engine, check the valve clearance, as they can also cause knocking. Oil consumption. Also, at high mileage, oil consumption often appears up to 1 liter per 1000 km. Only an overhaul can help here, as usually it is caused by worn oil control rings. Electrical problems. Weak points of this engine include regular sensor failures. For example, the most common cause of increased fuel consumption is a burnt lambda sensor, and when the temperature sensor fails, the car usually won't start at all. According to the forums, the absolute pressure and throttle position sensors often fail. Minor breakdowns. Due to their old age, these engines regularly have minor issues: ignition system failures are quite common, crankshaft seal leaks occur frequently, and idle motor speed fluctuates due to injector and throttle fouling.