Buy Lexus GX470 Fuel Injectors

The Lexus GX 470 uses a 4.7-liter 2UZ-FE V8 that relies on eight small but mighty fuel injectors-sometimes called petrol sprayers, injector valves, or fuel nozzles-to mist gasoline into each cylinder for clean, even power. (MotorReviewer) These four-hole, multi-port injectors help the SUV achieve strong torque while keeping exhaust clean. (ACKO Drive)

Each injector opens and closes many times every second. Pressurized fuel enters the rail, the engine computer sends a pulse, and the nozzle sprays a fine cone of gasoline that mixes with air. This is called multi-point fuel injection (MPFI). Because the 2UZ-FE uses one sprayer per cylinder, fuel is measured more exactly than in old throttle-body setups, giving smoother idle and better mileage. You can explore a simple diagram at fuel injection basics.

A tired or leaking injector lets too little-or too much-fuel into a cylinder. Common signs include:

• Rough idle or engine shake (Jiffy Lube)
• Misfire codes (P0301-P0308) and flashing "Check Engine" light (Bell Lexus North Scottsdale)
• Hard starts, poor acceleration, or sudden drops in MPG (Jiffy Lube)
• Gasoline smell near the hood or tailpipe black smoke, which means extra fuel is slipping past the spark. (Injector Rx)

• Keep fuel clean. Top-tier gasoline already has detergents, but adding a bottle of Chevron Techron or Red Line SI-1 every few oil changes can wash gum off the injector pintle. (Reddit, Toyota 4Runner Forum)
• Change the fuel filter every 30 k miles so dirt never reaches the spray holes. (AAA International Relations)
• Run the SUV weekly. Short trips leave moisture that can corrode injector coils.
• Watch long-term trims. A simple code reader that shows fuel-trim numbers can warn you of a slow clog before you feel it.

For more do-it-yourself pointers, see this handy .

When swapping injectors:

1. Relieve fuel pressure and remove the battery ground.
2. Unbolt the rail: Factory Service Manual torque spec is about 15 ft-lb (20 N·m) on the hold-down nuts. (Club Lexus, IH8MUD Forum)
3. Lube new O-rings with a drop of fresh engine oil so they slide in without tearing. (IH8MUD Forum)
4. Seat injectors straight. Twisting can crack the plastic body.
5. Re-prime the system and check for drips before starting the engine.

A step-by-step photo thread is available on the ClubLexus forum.

Part number 23209-0F010 fits every GX 470 built from 2003-2009 and shares dimensions with certain 4Runner, Tundra, Sequoia, and Land Cruiser models that also use the 2UZ-FE. (YotaShop) This matters if you are cross-shopping engines or looking for a matched set.

Some owners install flow-matched, high-output injectors when adding a supercharger or big camshafts. Larger nozzles can make more power, but the ECU fuel maps must be recalibrated so the V8 does not run rich. (MotorMan Fuel Injection) A dyno tune is the safest path.

A dripping injector can flood the catalytic converter with raw fuel, overheat the core, and trigger code P0420. (Reddit, Midland Muffler & Brake) In rare cases, external leaks raise fire risk, which is why other brands have issued injector recalls. (The US Sun, Axios) Regular checks keep both emissions and safety in check. The U.S. EPA shares additional vehicle repair guidance.

• Scan for misfire or lean codes.
• Use a mechanic's stethoscope; a healthy injector clicks evenly.
• Compare fuel-trim data; a clogged sprayer shows a positive long-term trim on that bank.
• Perform a leak-down test if the rail loses pressure overnight. (IH8MUD Forum)

• ClubLexus DIY thread - torque specs and photos
• IH8MUD forum guide - step-by-step seal replacement
• ACKO Drive explainer - MPFI basics
• Jiffy Lube resource - clear symptom list
• EPA maintenance pdf - emissions tips

With proper care, the GX 470's fuel injectors-those tiny but essential fuel sprayers-can keep your V8 purring for hundreds of thousands of miles.