Injection pump for Nissan Skyline V35: device, problems and solutions

Main components of fuel injection pump Skyline V35:

• 🔧 Plunger pair - the heart of the pump, responsible for creating pressure. Wear of the plungers leads to a drop in performance.
• ⚙️ Camshaft - sets the plungers in motion. On V35 often suffers from insufficient lubrication.
• 📊 Solenoid valve (pressure regulator) - controls the fuel supply depending on the ECU signals.
• 🛢️ Fuel accumulator (ramp) - accumulates fuel under high pressure before injection.

Feature Skyline V35 — integration of fuel injection pump with the system Nissan ECU, which adjusts the pump’s operation in real time. For example, during sharp acceleration, the ECU increases the pressure in the ramp, and during engine braking, it decreases. This requires precise calibration of the sensors, otherwise malfunctions may occur.

Signs of a fuel injection pump malfunction: how to recognize the problem

Injection pump malfunctions on Nissan Skyline V35 appear gradually, but ignoring them is dangerous - this can lead to breakdown of injectors or water hammer in the cylinders. Here are the key symptoms:

🚨 Loss of power and “dips” during acceleration. If your car reacts poorly to the gas pedal, especially at speeds above 3000 rpm, a worn plunger or clogged fine filter may be to blame. On V35 this is often accompanied by an error P0191 (low pressure in the fuel rail).

🔥 Increased fuel consumption. The high-pressure fuel injection pump, which is running “weary,” begins to supply more fuel than required. For example, if previously it took 10 liters per 100 km, but now it’s 13–14, this is a reason to check the pump.

🛑 Difficulty starting the engine. It is especially noticeable in cold weather: the starter turns, but the engine does not “get enough”. The reason is insufficient pressure in the rail due to wear of the regulator valve or air leaks in the line.

💨 Smoky exhaust. Black smoke indicates an over-enriched mixture (the injection pump is “pouring” fuel), and white smoke indicates that antifreeze has entered the cylinders (a crack in the pump housing is possible).

Injection pump diagnostics: tools and methods

To accurately determine the condition of the injection pump Skyline V35, a comprehensive diagnosis will be required. Start with error scanning via OBD-II. Typical codes associated with fuel injection pump:

• P0087 — low pressure in the fuel rail;
• P0190 — malfunction of the pressure sensor circuit;
• P0300 - random misfires (may be due to uneven fuel supply).

Next check fuel system pressure. To do this:

1. Connect the pressure gauge to the fitting on the fuel rail (usually located to the right of the intake manifold).
2. Start the engine and measure the pressure at idle speed - the norm for V35: 3.5–4.0 bar.
3. Press the gas sharply: the pressure should jump to 5.5–6.0 bar. If growth is slow or absent, the injection pump is faulty.

Also inspect fuel filter condition and highways. On Skyline V35 Often air leaks occur through cracks in rubber hoses or corroded clamps. To check use smoke tester or spray the connections with carburetor cleaner - if the engine speed changes, there is suction.

Typical fuel injection pump failures on Skyline V35 and their causes

Analysis of owner forums Nissan Skyline V35 shows that the most common fuel injection pump problems are related to wear of plunger pairs, solenoid valve failure And camshaft corrosion. Let's look at each in more detail.

The problem with camshaft corrosion. B Skyline V35 In the first years of production (2001–2003), pumps with insufficient protection from moisture were used. If the car was parked for a long time with a half-empty tank, condensation could get into the fuel and cause rust on the shaft. The sign is a metallic grinding sound when the pump is running.

⚠️ Attention: If metal particles are found in the fuel filter, the vehicle must not be driven! This may cause the plungers to jam and destruction of injectors costing up to 50,000 rubles apiece.

Repair vs replacement of fuel injection pump: which is more profitable for Skyline V35

The cost of a new injection pump for Nissan Skyline V35 varies from 80,000 to 150,000 rubles depending on the manufacturer. Budget analogues (for example, Denso or Bosch) will cost less, but their resource is often lower than the original (Hitachi). Repair costs 20,000–40,000 rubles, but not always advisable.

🔧 When repairs are justified:

• 🔧 Wear of plunger pairs (replacement costs 10,000–15,000 rubles).
• 🔧 Solenoid valve malfunction (replacement - 5,000–8,000 rubles).
• 🔧 Air leaks through seals (replacement of gaskets - 2,000–3,000 rubles).

❌ When only replacement:

• 💀 Cracks in the pump housing.
• 💀 Severe corrosion of the cam shaft (repair is not cost effective).
• 💀 Failure of the shaft bearings (may lead to destruction of the entire assembly).

When choosing between repair and replacement, consider the vehicle's mileage. If Skyline V35 I have driven more than 250 thousand km, it is more logical to invest in a new pump - this will solve the problem for a long time. For cars with mileage up to 200 thousand km, high-quality repairs are often enough.

Drain the fuel from the tank (at least 2/3 of the volume)|Disconnect the battery terminal|Remove the fuel lines, first releasing the pressure|Prepare a new fine filter|Have a torque wrench on hand to tighten the fasteners-->

Selection of spare parts: original vs analogues

For Nissan Skyline V35 the original injection pump is produced by the company Hitachi (article - 16600-4M000 or 16600-4M001 depending on the year of manufacture). Its average price is 120,000 rubles. Popular analogues include:

• 🏭 Denso (article 955000-5003) is a reliable option, but may require modification of the fastenings.
• 🏭 Bosch (series CP1H) - suitable for turbocharged versions VQ35DE, but requires reconfiguring the ECU.
• 🏭 Delphi (article HFP100) is a budget option, but the resource is 30–40% lower than the original.

When purchasing a used fuel injection pump, pay attention to:

• 🔍 Condition of plungers - there should be no scoring or corrosion.
• 🔍 Camshaft play — a minimum gap is allowed (up to 0.1 mm).
• 🔍 Solenoid valve integrity — check the resistance with a multimeter (normal: 2–5 ohms).

⚠️ Attention: When installing a non-original injection pump on Skyline V35 ECU firmware may be required. For example, pumps Bosch often require adjustment of injection maps, otherwise the engine will operate in emergency mode.

Prevention and increase in fuel injection pump resource

Average fuel injection pump resource per Nissan Skyline V35 — 200,000–250,000 km, but with proper maintenance it can be extended to 300,000 km. Here are the key recommendations:

⛽ Fuel quality. Use gasoline with an octane rating of at least AI-95 (optimally - AI-98). At disreputable gas stations, add additives to clean the fuel system (for example, Liqui Moly Fuel System Cleaner).

🔧 Regular replacement of filters:

• 📅 Coarse filter (mesh in the tank) - every 60,000 km.
• 📅 Fine filter - every 30,000 km (or more often if the fuel is of poor quality).

🚗 Operating Tips:

• 🔋 Do not allow the engine to run “pull” (at low speeds under load) - this increases the load on the injection pump.
• ❄️ During the winter, use anti-gel for fuel (even if you have a gasoline engine).
• 🔌 Once a year, check the condition of the pump terminals - oxidation of contacts can cause malfunctions.

If the car sits idle for a long time (more than 2 months), drain the fuel from the tank or add stabilizer. Otherwise, sediment will form at the bottom, which, upon first start-up, will enter the injection pump and accelerate wear of the plungers.

FAQ: Frequently asked questions about fuel injection pump on Skyline V35