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- Porsche 944 2.5L 8V 1982-87
The injector 944 606 110 01 is made for the early Porsche 944 with the 2.5L 8-valve inline-4 engine (1982–85). The injectors deliver a fine, metered spray of fuel into the intake port (or manifold) synchronized with engine control signals (pulse width). The engine’s control module (DME) varies how long the injector is open (duty cycle) to control air/fuel ratio. required is 4 per car. Price is for each.
These injectors are part of the Bosch-style / early Porsche / Jetronic fuel injection system (common to many 4-cylinder Porsches). The 944 injector 944 606 110 01 is cross-referenced with Bosch part 0280150201.
Fits:
Porsche 944 2.5L 8V 1982-85
Common failure modes / issues
Clogging or partial occlusion
Deposits from fuel (e.g. varnish, gums, carbon) can accumulate on the injector nozzle or internal filter screens, restricting flow or altering spray pattern. This leads to inconsistent fuel delivery, lean condition on one cylinder, misfires, or rough idle.
Leaking (internal or external)
Injector may leak fuel when closed (i.e. dribble), due to worn needle/seat or weakened internal seals. That causes flooding, rich mixture, poor idle, or fuel smell. External leakage (o-rings degraded) can cause fuel to leak externally around injector, risking fire or vacuum leaks.
Electrical degradation
The coil windings inside can degrade (partial shorts, increased resistance, insulation breakdown) — leading to slow response, weak spray, or complete failure. Connector terminals or wiring may corrode, break, or have poor connection.
Wear / fatigue of internal moving parts
The needle, pintle, spring, and internal tolerances wear over time; that increases “dead time” (delay between signal and actual opening) and changes the effective flow versus command duty cycle. Over time, this causes imbalance between cylinders, mis-tuning, and drivability issues.
Imbalanced or mismatched injectors
Over time, injectors can drift in flow rate; if one injector flows slightly more or less than the others, cylinder fuel balance is upset. A matched set is ideal. When replacing only one injector, mismatch can worsen performance.
Aging seals / O-rings / insulator degradation
The rubber/plastic O-rings that seal the injector to the intake manifold may harden, crack or leak, causing vacuum leaks or fuel vapour escape. The body insulator or mounting flange may degrade, causing mechanical looseness.
Spray pattern deterioration
If the spray cone or atomization pattern is degraded (due to nozzle wear or damage), fuel may not vaporize correctly, leading to incomplete combustion, poorer fuel economy, or emissions issues.
Intermittent or total failure
In some cases, an injector might fail open (permanently on) or stuck (never opens). That leads to severe lean/rich condition or a dead cylinder.
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The injector securing ring is a precision fastening component used within the fuel injection system to securely hold the fuel injector in place within the engine. Designed to OE specifications, this ring ensures correct positioning and sealing of the injector, allowing it to operate efficiently under high pressure.
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x6 Required Per Car.
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Diagram Ref No 22
What This Product Does:
- Holds the fuel injector securely in position
- Maintains proper alignment of the injector within the engine
- Supports a tight seal to prevent fuel leaks
- Ensures efficient and accurate fuel delivery into the combustion chamber
Symptoms Of Wear Or Failure:
- Fuel leaks around the injector area
- Loose or improperly seated injectors
- Fuel smell from the engine bay
- Poor engine performance or misfires
- Difficulty maintaining proper injector seal during installation
Why Replacement Matters:
- Ensures injectors are securely mounted and properly aligned
- Prevents fuel leaks and potential safety hazards
- Maintains correct fuel delivery and combustion efficiency
- Protects engine components from fuel contamination
- Supports reliable engine performance and operation
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Injector Spacer Ring.
The injector spacer ring is a precision component used within the fuel injection system to ensure correct positioning and spacing of the fuel injector within the engine. Designed to OE specifications, this ring sits between the injector and its mounting point, helping maintain proper alignment, sealing, and installation depth.
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Diagram Ref No 18
What This Product Does:
- Maintains correct positioning and depth of the fuel injector
- Ensures proper sealing between injector and engine components
- Supports accurate fuel spray pattern and atomisation
- Helps prevent leaks and misalignment during operation
Symptoms Of Wear Or Failure:
- Fuel leaks around the injector area
- Incorrect injector seating or looseness
- Poor fuel atomisation or uneven combustion
- Engine misfires or rough running
- Difficulty achieving a proper seal during injector installation
Why Replacement Matters:
- Ensures correct injector alignment and positioning
- Prevents fuel leaks and sealing issues
- Maintains optimal fuel spray and combustion efficiency
- Supports smooth engine operation and performance
- Helps avoid further damage to injectors or engine components
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Injector Retaining Ring.
The injector retaining ring is a key fastening component within the fuel injection system, designed to securely hold the fuel injector in its correct position within the engine. Manufactured to OE specifications, this retaining ring ensures a firm and stable fit, maintaining proper alignment and sealing of the injector under high-pressure operating conditions.
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Diagram Ref No 20
What This Product Does:
- Secures the fuel injector firmly in place
- Maintains correct injector alignment and positioning
- Supports proper sealing to prevent fuel leaks
- Ensures consistent and efficient fuel delivery into the engine
Symptoms Of Wear Or Failure:
- Loose or misaligned fuel injectors
- Fuel leaks around the injector area
- Fuel smell from the engine bay
- Engine misfires or rough running
- Difficulty securing injectors during installation
Why Replacement Matters:
- Ensures injectors are securely mounted and properly aligned
- Prevents fuel leaks and potential safety risks
- Maintains correct fuel delivery and combustion efficiency
- Protects engine components from fuel contamination
- Supports reliable and consistent engine operation
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