Hero Splendor Plus Injector Problem – Starting Issues and Complete Fix (Step-by-Step Guide)
When it comes to commuter motorcycles, the Hero Splendor Plus has been one of the most trusted bikes in India for decades. With the BS6 upgrade, Hero replaced the traditional carburetor with a Fuel Injection (FI) system, making the bike more fuel-efficient and eco-friendly.
But with new technology also comes new problems. Many Splendor Plus BS6 owners face starting issues, poor pickup, or injector-related problems. If your Hero Splendor Plus injector is not working, don’t panic. In this post, we’ll cover everything you need to know:
Why the injector fails
Common symptoms of injector issues
Step-by-step troubleshooting
DIY solutions at home
When to visit a mechanic or service center
Let’s dive deep.
1. How the Fuel Injection System Works in Hero Splendor Plus
Unlike the carburetor in older Splendor models, the fuel injector sprays fuel directly into the engine based on signals from the ECU (Engine Control Unit). The ECU reads data from sensors such as:
- Throttle Position Sensor (TPS)
- Oxygen Sensor (O2)
- MAP Sensor (Manifold Absolute Pressure)
- Crankshaft Position Sensor
All these sensors ensure that the right amount of fuel mixes with air for combustion. If the injector stops working, the bike will either not start at all or run poorly.
2. Common Signs of Injector Problems in Splendor Plus BS6
Before jumping into solutions, you should know the common symptoms of injector issues:
1. Starting problem – The bike doesn’t start or takes long cranking.
2. Engine misfires – Jerks or loss of power while riding.
3. Low mileage – Sudden drop in fuel efficiency.
4. FI warning light blinking – An error code from the ECU.
5. Poor throttle response – Acceleration feels delayed.
6. Black smoke from exhaust – Sign of excess fuel due to injector malfunction.
If you’re facing one or more of these issues, it’s time to check the injector.
3. Why Hero Splendor Plus Injector Fails
The fuel injector is sensitive. Here are the top reasons it may stop working:
Low battery voltage – FI system needs proper current.
Clogged injector nozzle – Due to bad petrol or dirt.
Fuel pump failure – No fuel supply to the injector.
Sensor malfunction – ECU doesn’t send proper signal.
ECU issues – Rare, but possible if wiring is damaged.
Poor fuel quality – Water or impurities in petrol.
4. Step-by-Step Guide to Fix Injector Issues
Now, let’s go through a proper diagnosis and fix guide.
Step 1: Battery Check
Use a multimeter to check voltage.
Anything below 12.4V means weak battery.
Recharge or replace if needed.
Step 2: Fuel Pump Check
Turn ON ignition.
You should hear a humming sound (fuel pump priming).
If no sound, the fuel pump may be dead.
Step 3: Spark Plug Check
Remove spark plug and inspect.
Dry plug → Fuel not reaching (injector issue).
Wet plug → Fuel is reaching but no spark.
Step 4: Injector Cleaning
Remove injector carefully.
Spray injector cleaner or carb cleaner on the nozzle.
Use compressed air to clean.
Reinstall and test again.
(⚠️ Pro tip: If you have access to an ultrasonic cleaner, it works best for deep cleaning.)
Step 5: Sensors Check
FI bikes rely on sensors. If TPS or O2 sensor is faulty, injector won’t spray correctly.
You’ll need a diagnostic scanner at a Hero service center.
Step 6: ECU and Wiring
Check for loose connections or broken wires.
If FI light blinks, note the code (e.g., 1 long + 2 short blinks = specific sensor error).
5. DIY Solutions You Can Try at Home
If you are stuck somewhere and your bike won’t start, try these quick fixes:
1. Fully charge the battery – Sometimes it’s just low power.
2. Kick start instead of self-start – This gives extra power to injector.
3. Clean the spark plug – A dirty plug can mimic injector issues.
4. Tap the fuel pump gently – If it’s stuck, this can free it temporarily.
5. Use injector cleaner fuel additive – Pour it into petrol tank to clean nozzle over time.
6. When to Visit a Mechanic
Even though you can do basic checks at home, some cases need professional help:
- FI light continuously blinking
- Fuel pump not making any noise
- Injector not spraying even after cleaning
- Multiple sensors showing error codes
- Bike suddenly shuts down while riding
A Hero authorized service center has diagnostic tools to read ECU codes and fix the issue quickly.
7. How to Prevent Injector Problems in Splendor Plus
Prevention is always better than cure. Follow these tips:
Use high-quality petrol (avoid roadside fuel).
Service your bike regularly – clean injector every 10,000 km.
Replace fuel filter on time.
Keep battery charged – especially if you don’t ride daily.
Check wiring and sensors during routine service.
8. Cost of Repair
Approximate costs in India (may vary in USA/other regions):
Injector cleaning: ₹300 – ₹800
New injector: ₹2,000 – ₹3,500
Fuel pump replacement: ₹4,000 – ₹6,000
ECU replacement: ₹5,000+
Basic service + scanning: ₹500 – ₹1,000
9. Final Thoughts
The Hero Splendor Plus BS6 is a reliable bike, but fuel injection problems can be frustrating if you’re not familiar with them. The good news is that most injector problems are caused by bad fuel or a weak battery, and they can be fixed easily.
If your injector is not working and your bike has a starting problem, follow the troubleshooting steps above. In most cases, cleaning the injector and maintaining the battery will solve the issue.2025/09/bs6-bike-battery-saving-ideas-to-make.html
But if the problem persists, don’t waste time – head straight to an authorized Hero service center. They have the tools to scan the ECU and repair it correctly.
✅ With proper maintenance, your Splendor Plus can easily run over 1,00,000 km without major issues. Keep your fuel clean, service regularly, and your injector will stay healthy.
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