Safety Warning
- Raw fuel in exhaust creates fire hazard - avoid smoking or open flames near vehicle
- Continued driving with severe misfires can damage catalytic converter
- Engine may stall unexpectedly, creating driving hazard
- Ensure proper ventilation when working around fuel vapors
Quick Diagnosis Summary
If you're experiencing engine misfires accompanied by a strong fuel smell in your 2017 Dodge Charger, you're dealing with a high-severity issue that requires prompt attention. This combination of symptoms typically indicates unburned gasoline is entering your exhaust system, creating both performance problems and potential safety hazards. Understanding the root causes and repair options will help you address this problem quickly and safely.
Engine misfires with fuel odor are particularly concerning because they can damage expensive components like your catalytic converter if left untreated. The 2017 Dodge Charger, while generally reliable, has known issues with certain ignition system components that commonly cause these symptoms.
Recognizing the Symptoms
When your 2017 Charger develops engine misfires with fuel contamination, you'll likely notice several warning signs:
- Strong gasoline odor: You'll smell raw fuel, especially from the exhaust or engine bay
- Rough idle: The engine shakes or vibrates noticeably while idling
- Engine hesitation: Poor acceleration or stuttering during acceleration
- Check Engine Light: The dashboard warning light illuminates
- Reduced fuel economy: Noticeable decrease in miles per gallon
- Engine stumbling: Power loss or jerking sensation while driving
- Black exhaust smoke: Dark smoke indicating rich fuel mixture
These symptoms may worsen under load, such as when accelerating uphill or merging onto highways. Some drivers also report a "popping" sound from the exhaust system.
Common Causes of Engine Misfire with Fuel Smell
Faulty Ignition Coil (High Probability)
The 2017 Dodge Charger is particularly susceptible to ignition coil failures, making this the most likely culprit. When an ignition coil fails, it can't provide adequate spark to ignite the fuel-air mixture completely. This results in unburned fuel passing through the exhaust system, creating the characteristic gasoline smell. Chrysler issued several technical service bulletins addressing coil-on-plug failures in this model year.
Defective Spark Plugs (High Probability)
Spark plugs in the 2017 Charger typically need replacement around 60,000-80,000 miles, depending on driving conditions. Worn spark plugs can't create a strong enough spark for complete combustion, leading to misfires and raw fuel in the exhaust. Carbon fouling, oil contamination, or electrode wear are common causes of spark plug failure.
Leaking Fuel Injector (Medium Probability)
A stuck-open or internally leaking fuel injector delivers excessive fuel to a cylinder. This creates an overly rich mixture that can't burn completely, resulting in misfires and strong fuel odors. Injector problems often affect multiple cylinders and can cause significant fuel waste.
Damaged Spark Plug Wires or Boots (Medium Probability)
While less common in newer vehicles, damaged ignition wires or coil boots can cause weak spark delivery. Heat cycling, oil contamination, or physical damage can compromise the electrical connection, leading to incomplete combustion and fuel smell.
Low Cylinder Compression (Lower Probability)
Internal engine problems such as worn piston rings, valve issues, or head gasket problems can reduce compression in one or more cylinders. While less common in a 2017 model, these issues can cause misfires and poor fuel combustion.
Diagnosing the Problem
Proper diagnosis is crucial for effective repair. Here's how professionals typically identify the specific cause:
OBD-II Scan
The first step involves scanning for diagnostic trouble codes using an OBD-II scanner. Common codes include P0300 (random misfire), P0301-P0308 (cylinder-specific misfires), and P0351-P0358 (ignition coil circuit faults).
Visual Inspection
Technicians examine ignition coils, spark plugs, and wiring for obvious signs of damage, corrosion, or oil contamination. They also check for fuel leaks around injectors and fuel rails.
Component Testing
Individual components are tested using specialized equipment. Ignition coils are tested for proper resistance and spark output, while fuel injectors are checked for proper spray patterns and flow rates.
Compression Test
If other components check out, a compression test determines if internal engine problems are causing the misfires.
Repair Options and Approaches
Professional Repair
Most drivers choose professional repair for ignition system problems due to the diagnostic expertise required. Professional technicians can quickly identify the exact cause and ensure proper repair. They also have access to updated technical service bulletins and recall information specific to your 2017 Charger.
DIY Repair Considerations
DIY repair is moderately feasible for experienced home mechanics. Replacing spark plugs and ignition coils requires basic tools and moderate skill. However, fuel injector problems typically require specialized equipment and should be left to professionals. Always disconnect the battery and allow the engine to cool before beginning any work.
Repair Costs Breakdown
Repair costs for engine misfire issues in your 2017 Charger typically range from $120 to $300, depending on the specific cause:
- Spark plug replacement: $120-$180 (includes labor)
- Single ignition coil replacement: $150-$220
- Multiple coil replacement: $200-$350
- Fuel injector cleaning/replacement: $200-$400 per injector
- Diagnostic fee: $100-$150 (often applied to repair cost)
DIY repairs can save 50-70% on labor costs, but ensure you have proper tools and experience before attempting repairs.
Prevention Tips
Prevent future ignition system problems with these maintenance practices:
- Use quality fuel: Choose top-tier gasoline to reduce injector fouling
- Replace spark plugs on schedule: Follow manufacturer intervals (typically 60,000-100,000 miles)
- Keep up with oil changes: Clean oil prevents coil and plug contamination
- Address check engine lights promptly: Early intervention prevents cascading damage
- Use fuel system cleaners: Periodic use helps maintain injector cleanliness
- Avoid cheap aftermarket parts: Quality ignition components last longer
Safety Warnings
Important: Engine misfires with fuel smell create serious safety risks:
- Raw fuel vapors are highly flammable - avoid smoking or open flames near the vehicle
- Continued driving can damage the expensive catalytic converter
- Severe misfires may cause unexpected engine stalling
- Always work in well-ventilated areas when dealing with fuel-related repairs
- If you smell fuel inside the cabin, pull over immediately and seek professional help
Address this issue promptly to avoid more expensive repairs and ensure safe vehicle operation. The combination of engine misfires and fuel smell requires immediate attention from a qualified technician.
Frequently Asked Questions
No, you should avoid driving with these symptoms. The raw fuel creates a fire hazard, and continued operation can damage your catalytic converter, leading to expensive repairs. Have the vehicle diagnosed and repaired as soon as possible.
The 2017 Charger uses coil-on-plug ignition systems that are exposed to high heat and vibration. Chrysler issued technical service bulletins addressing premature coil failures in this model year, often related to heat damage and manufacturing defects in certain coil batches.
Use an OBD-II scanner to read diagnostic codes. Codes P0301-P0308 indicate specific cylinder misfires (P0301 = cylinder 1, P0302 = cylinder 2, etc.). A random misfire code (P0300) indicates multiple cylinders are affected.
While you can replace just the faulty coil, many mechanics recommend replacing coils in pairs or sets since they wear similarly. If one coil fails around 60,000-80,000 miles, others may fail soon after. This approach saves on future labor costs.
Ignoring misfires can lead to catalytic converter damage (costing $1,000+), reduced fuel economy, engine damage from fuel washing cylinder walls, and potential safety hazards from fuel vapors. Early repair prevents these expensive complications.
Poor quality fuel can contribute to misfires by fouling spark plugs or injectors, but it rarely causes the strong fuel smell associated with this problem. The fuel odor typically indicates a mechanical failure in the ignition or fuel delivery system that requires repair.