10 Symptoms of a Bad Fuel Injector: Warning Signs You Can’t Ignore

Bad fuel injectors can turn your smooth-running engine into a nightmare of poor performance, wasted fuel, and expensive repairs if left unchecked. Unlike some car problems that develop slowly over time, fuel injector issues often announce themselves loudly through rough running, misfires, and terrible gas mileage. The good news? Once you know what to look for, diagnosing fuel injector problems becomes much easier—and catching them early can save you hundreds or even thousands of dollars.

What Do Fuel Injectors Actually Do?

Your fuel injectors are precision valves that spray a fine mist of gasoline directly into your engine’s combustion chambers (or intake ports, depending on your engine type). They open and close thousands of times per minute, delivering exactly the right amount of fuel at exactly the right moment for optimal combustion.

Modern engines rely on computer-controlled fuel injection to achieve the perfect air-fuel ratio (typically 14.7:1 for gasoline engines). When even one injector starts clogging, leaking, or failing electronically, that precision goes out the window—and your engine performance suffers immediately.

10 Warning Signs of Bad or Clogged Fuel Injectors

If your fuel injectors are failing or clogged, you’ll typically notice one or more of these symptoms:

1. Rough idle and engine vibration – Noticeable shaking when stopped at lights
2. Engine misfires on one or more cylinders – Stumbling, hesitation, or jerking
3. Poor fuel economy – Sudden drop of 15-30% in gas mileage
4. Check engine light with misfire codes – P0300-P0308 or P0201-P0212 codes
5. Difficulty starting, especially when cold – Extended cranking or hard starts
6. Loss of power and sluggish acceleration – Car feels weak or unresponsive
7. Failed emissions test – High hydrocarbon or CO readings
8. Fuel smell or visible fuel leaks – Gasoline odor around engine
9. Black smoke from exhaust – Sign of running too rich
10. Engine knocking or pinging – Abnormal combustion noises

Let’s dive into each symptom so you understand what’s happening and what it means for your wallet.

Can Bad Fuel Injectors Cause Rough Idle?

Absolutely, and rough idle is often the first symptom most people notice. Your engine will shake, vibrate, or feel like it’s about to stall when you’re stopped at a red light.

Why rough idle happens: Fuel injectors spray fuel in precise patterns and amounts. When one or more injectors clog or malfunction, that cylinder isn’t getting the right amount of fuel—or any fuel at all. This creates an uneven firing pattern across cylinders, causing the engine to shake and run roughly.

What rough idle from bad injectors feels like:

• Noticeable vibration through the steering wheel and seat
• RPM needle bouncing or fluctuating (hunting)
• Engine sounds rough or uneven
• Sometimes gets worse when AC or electrical loads are on

The pattern to watch for: Fuel injector-related rough idle is usually consistent and present every time the engine is idling. If your rough idle comes and goes randomly, it might be a different issue like vacuum leaks or ignition problems.

Quick fix to try first: Before assuming you need new injectors, try using a quality fuel injector cleaner. Clogged injectors often respond well to chemical cleaning, which costs under $15 and takes just one tank of gas to see results.

Do Bad Fuel Injectors Cause Engine Misfires?

Yes, and engine misfires are one of the clearest indicators of injector problems. A misfire means one or more cylinders aren’t firing properly, creating a stumbling, jerking sensation that’s impossible to miss.

Why misfires occur: When a fuel injector clogs completely or fails electronically, that cylinder receives little or no fuel. Without fuel, there’s nothing to ignite—so that cylinder misfires (or doesn’t fire at all). Even partially clogged injectors can cause misfires by delivering insufficient fuel.

What a misfire feels like:

• Jerking or stumbling during acceleration
• Loss of power, especially under load
• Rough, uneven engine operation
• Sometimes a noticeable “thump” or hesitation

Check engine codes: Misfires trigger specific trouble codes:

• P0300: Random multiple cylinder misfire
• P0301-P0308: Misfire on specific cylinder (1-8)
• P0201-P0212: Injector circuit malfunction on specific cylinder

Diagnosis tip: If your scan tool shows misfires on just one or two specific cylinders consistently, those cylinders’ injectors are likely the problem. Random misfires across all cylinders suggest a different issue (like bad spark plugs or ignition coils).

Will Clogged Fuel Injectors Cause Poor Gas Mileage?

Dramatically poor fuel economy is a hallmark symptom of bad fuel injectors, and it’s often how people first realize something’s wrong when they suddenly need to fill up twice as often.

Why fuel economy tanks: When injectors malfunction, they might:

• Spray too much fuel (leaking or stuck open)
• Spray unevenly or in the wrong pattern (partially clogged)
• Force the engine computer to compensate by richening the mixture

All of these scenarios waste fuel. Your engine essentially burns extra gas to make up for inefficient combustion.

How bad can it get? You might see a 15-30% drop in fuel economy. A car that normally gets 28 MPG might drop to 20-22 MPG or worse. Over a year, that’s potentially $500-800 in wasted fuel—far more than the cost of cleaning or replacing injectors.

The budget impact: If you’re spending $200/month on gas and your fuel economy drops 25%, you’re now spending $250/month—that’s $600/year in extra costs. And that’s not counting the potential damage to your catalytic converter from running rich.

Companion symptoms: Poor fuel economy from bad injectors usually comes with other signs like rough idle, black exhaust smoke, or a strong gasoline smell.

Can Bad Fuel Injectors Trigger the Check Engine Light?

Yes, bad fuel injectors will almost always trigger the check engine light, often with very specific codes that point directly to the problem.

Common fuel injector-related trouble codes:

Injector circuit codes (electrical problems):

• P0201-P0212: Injector circuit malfunction for cylinders 1-12
• These codes indicate electrical issues with the injector itself or its wiring

Misfire codes (performance problems):

• P0300: Random/multiple cylinder misfire
• P0301-P0308: Cylinder-specific misfire detected
• These often result from clogged or malfunctioning injectors

Fuel system codes:

• P0171/P0174: System too lean (Bank 1/Bank 2)
• P0172/P0175: System too rich (Bank 1/Bank 2)
• These can indicate injectors spraying too much or too little fuel

Diagnosis importance: Don’t ignore check engine codes. A $20 code reader from Amazon or a free scan at most auto parts stores will tell you exactly which cylinder is misfiring or which injector circuit has a problem. This information is gold for diagnosis and can save you from replacing the wrong parts.

Do Bad Fuel Injectors Make Starting Difficult?

Yes, failing fuel injectors can make your car harder to start, and you’ll typically notice extended cranking times before the engine finally catches.

Why starting becomes difficult: During startup, your engine needs a precise fuel mixture to fire up quickly. Clogged or malfunctioning injectors can’t deliver that mixture properly, forcing the starter to crank longer while the engine struggles to build enough combustion to run.

What you’ll experience:

• Engine cranks 3-5+ seconds instead of starting in 1-2 seconds
• Sometimes requires multiple attempts to start
• May start and then immediately stall
• Often worse when the engine is cold

Cold start problems: Fuel injector issues are particularly noticeable during cold starts because cold engines need slightly richer fuel mixtures. If your injectors can’t deliver that, cold starts become especially difficult.

Don’t confuse with: Hard starting can also be caused by weak batteries, failing starter motors, bad spark plugs, or fuel pump problems. The difference is that injector-related hard starting usually comes with other symptoms like rough idle and poor fuel economy.

Can Clogged Fuel Injectors Cause Power Loss?

Absolutely. Loss of power and sluggish acceleration are common symptoms of bad fuel injectors, making your car feel tired, weak, and unresponsive.

Why you lose power: Your engine produces power by burning fuel. When injectors can’t deliver fuel properly (whether from clogging, leaks, or electrical failure), your engine literally has less fuel to burn. Less fuel = less power. It’s that simple.

What power loss feels like:

• Sluggish acceleration, like you’re towing a trailer
• Difficulty merging onto highways
• Struggles climbing hills
• Takes longer to reach highway speeds
• Overall feeling of the engine being “strangled”

The severity progression: Minor injector clogging might only affect full-throttle performance. Severe clogging or complete injector failure can make the car barely drivable. You might lose 20-40% of your engine’s power output with badly clogged injectors.

Under load: Power loss from bad injectors is most noticeable when the engine is working hard—accelerating from a stop, climbing hills, or trying to pass other vehicles. Cruising at steady speeds might feel relatively normal.

Will Bad Fuel Injectors Cause You to Fail Emissions Testing?

Yes, bad fuel injectors are one of the top reasons vehicles fail emissions tests. If your injectors are malfunctioning, you’re almost guaranteed to fail.

Why you’ll fail emissions: Faulty injectors cause incomplete combustion, which dramatically increases harmful emissions:

• Hydrocarbons (HC): Unburned fuel from incomplete combustion
• Carbon monoxide (CO): From rich fuel mixtures
• Nitrogen oxides (NOx): Can increase from lean conditions

The legal problem: In most states, you can’t register your vehicle without passing emissions. This means bad injectors aren’t just a performance problem—they’re a legal requirement that must be fixed.

The OBD-II wildcard: Even if your tailpipe emissions would technically pass, modern OBD-II emissions testing will fail you if you have check engine codes for misfires or injector problems. You must fix the issue and clear the codes before you can pass.

Repair costs vs. test costs: Many people try to “get through” emissions with bad injectors, but this rarely works. You’ll spend $25-40 for each failed test attempt. After 2-3 failed attempts, you’ve already spent as much as a bottle of fuel injector cleaner or even a single replacement injector.

Can Leaking Fuel Injectors Cause a Fuel Smell?

Yes, leaking fuel injectors are a serious problem that often announces itself through a strong gasoline smell, especially around the engine bay or inside the cabin with the HVAC on.

Why fuel smells occur: Fuel injectors seal against high pressure (40-80+ PSI in most systems). When the O-rings deteriorate or the injector body cracks, fuel can leak externally onto hot engine components or internally into the combustion chamber even when the engine is off.

Types of injector leaks:

• External leaks: Fuel dripping onto the engine, creating visible wetness and strong smell
• Internal leaks: Injector doesn’t close fully, allowing fuel to seep into cylinders

Danger level: External fuel leaks are serious fire hazards. Gasoline on hot engine parts can ignite, especially in older vehicles. If you smell raw gasoline around your engine, investigate immediately.

Symptoms of leaking injectors:

• Strong fuel smell when parked (especially in enclosed spaces)
• Fuel odor inside the cabin
• Visible fuel stains or wetness around injectors
• Diluted engine oil (fuel washing past rings into crankcase)
• Hard starting after the car sits (flooded cylinders)

Does Black Smoke from Exhaust Mean Bad Injectors?

Black smoke is a clear visual indicator that your engine is running too rich (too much fuel), and leaking or stuck-open fuel injectors are a common cause.

Why black smoke appears: When fuel injectors leak, stick open, or spray incorrectly, they deliver too much fuel to the combustion chamber. The excess fuel can’t burn completely, creating black carbon particles that exit through your exhaust as visible black smoke.

When you’ll see black smoke:

• Most noticeable during hard acceleration
• Sometimes visible at startup (especially if injectors leak overnight)
• May leave black soot on your bumper or driveway
• Exhaust might smell very strongly of gasoline

The catalytic converter danger: Running rich doesn’t just waste fuel and create smoke—it can destroy your catalytic converter. Unburned fuel entering the exhaust system causes the converter to work overtime and can eventually melt the internal honeycomb structure ($1,000-2,500 repair).

Other causes to consider: Black smoke can also be caused by faulty oxygen sensors, bad mass airflow sensors, or engine computer problems. However, if black smoke comes with other injector symptoms (rough idle, misfires, poor fuel economy), the injectors are likely the culprit.

Can Bad Fuel Injectors Cause Engine Knocking?

Yes, bad fuel injectors can cause engine knocking (also called pinging or detonation), though it’s less common than other symptoms. This is a serious problem that can damage your engine if left unchecked.

Why knocking occurs: When fuel injectors malfunction, they might create an incorrect fuel mixture that detonates prematurely or unevenly in the combustion chamber. This abnormal combustion creates the distinctive knocking or pinging sound.

What engine knock sounds like:

• Metallic rattling or pinging noise, especially under acceleration
• Sounds like marbles rattling in a can
• Most noticeable when accelerating hard or climbing hills
• Gets worse as engine temperature rises

Types of injector-caused knock:

• Lean knock: Insufficient fuel causes hot spots and pre-ignition
• Rich knock: Too much fuel creates uneven flame propagation

The danger: Engine knock from bad injectors isn’t just annoying—it can cause serious damage. The shockwaves from abnormal combustion can crack pistons, damage bearings, and destroy head gaskets. If you hear knocking, get it diagnosed and fixed immediately.

What Causes Fuel Injectors to Go Bad?

Understanding what kills fuel injectors helps you prevent future problems and save money:

Most common causes of injector failure:

1. Dirty fuel and contamination: The #1 injector killer. Dirt, rust, and debris in fuel clogs the tiny injector nozzles and damages internal components.
2. Cheap or contaminated gas: Low-quality fuel or contaminated fuel (water in gas) accelerates injector deposits and corrosion.
3. Neglected fuel filter: A clogged fuel filter allows debris to reach injectors instead of catching it first.
4. Carbon buildup over time: Normal operation gradually builds up carbon deposits on injector tips, especially with short trips and city driving.
5. Age and heat cycles: Injectors eventually wear out from millions of open/close cycles and constant exposure to heat.
6. Ethanol in modern fuel: E10 and E15 fuels can accelerate corrosion and deposit formation in some engines.
7. Failed O-rings and seals: Rubber components deteriorate over time from heat and fuel exposure, causing leaks.
8. Electrical problems: Wiring issues, corrosion, or computer problems can prevent injectors from operating correctly.

Lifespan expectations: Most fuel injectors last 80,000-150,000 miles with proper fuel system maintenance. Some fail sooner in harsh conditions, while well-maintained vehicles might see injectors last 200,000+ miles.

Can You Clean Fuel Injectors or Must They Be Replaced?

Good news: many fuel injector problems can be fixed with cleaning, which is far cheaper than replacement. The key is catching problems early.

When cleaning works:

• Gradual performance decline over time
• No physical damage to injectors
• Check engine codes are for misfires or lean/rich conditions (not injector circuit codes)
• Injectors haven’t completely failed

When replacement is necessary:

• Injector circuit codes (P0201-P0212) indicating electrical failure
• Physical damage (cracked housing, damaged connectors)
• External fuel leaks from failed O-rings or injector body
• Cleaning doesn’t improve symptoms after 2-3 tanks

Cleaning methods:

1. Pour-in fuel injector cleaners (easiest, cheapest):

• Add cleaner to your fuel tank
• Drive normally for one full tank
• Cost: $10-20
• Success rate: 60-70% for mild to moderate clogging

2. Professional cleaning service:

• Mechanic connects pressurized cleaner to fuel rail
• Concentrated cleaner circulates through injectors
• Cost: $50-150
• Success rate: 70-80% for moderate clogging

3. Ultrasonic injector cleaning:

• Injectors removed and cleaned in ultrasonic bath
• Most thorough cleaning method
• Cost: $100-200 (plus labor to remove/reinstall)
• Success rate: 80-90% if injectors aren’t damaged

4. Full replacement:

• Install new or remanufactured injectors
• Cost: $50-200 per injector + labor
• Total repair: $300-1,500+ depending on engine

How Much Does Fuel Injector Replacement Cost?

If cleaning doesn’t solve your problem, replacement is the next step. Costs vary widely depending on your vehicle.

Typical replacement costs:

Per injector costs:

• Aftermarket injectors: $30-80 each
• OEM (factory) injectors: $100-300 each
• Remanufactured injectors: $50-150 each

Labor costs:

• Easy access (4-cylinder): 1-2 hours, $100-200 labor
• Moderate access (V6): 2-3 hours, $200-400 labor
• Difficult access (V8, transverse engines): 3-5 hours, $400-700 labor

Total replacement costs (all injectors):

• 4-cylinder engine: $400-1,200
• V6 engine: $600-1,800
• V8 engine: $800-2,500
• Luxury/performance vehicles: $1,500-4,000+

Should you replace just one or all of them?

If one injector fails and the others are high mileage (100,000+ miles), many mechanics recommend replacing all of them together. Here’s why:

• Once one fails, others often follow soon
• Labor cost is nearly the same whether you replace one or all
• Ensures balanced fuel delivery across all cylinders
• Prevents a return visit for the same labor costs

However, if your car is newer (under 80,000 miles) and only one injector has clearly failed, replacing just that one is usually fine.

How to Diagnose Bad Fuel Injectors

Before spending money on repairs, confirm that fuel injectors are actually the problem:

1. Scan for trouble codes: Use an OBD-II scanner to check for:

• Misfire codes (P0300-P0308)
• Injector circuit codes (P0201-P0212)
• Fuel trim codes (P0171, P0172, P0174, P0175)

2. Fuel injector balance test: Professional mechanics can perform a balance test that measures the contribution of each injector. This clearly identifies which injectors are weak or not firing.

3. Listen for clicking: With the engine running, use a mechanics stethoscope (or long screwdriver to your ear) to listen to each injector. You should hear rapid clicking as the injector opens and closes. No clicking = dead injector.

4. Check resistance: Using a multimeter, measure the electrical resistance of each injector. Most injectors should read 12-16 ohms. Significantly different readings indicate a bad injector.

5. Visual inspection: Remove injectors (or at least the fuel rail) and inspect for:

• Fuel leaks or wetness
• Damaged O-rings
• Corroded electrical connectors
• Carbon buildup on tips

6. Flow test: Professional shops can bench-test injectors to measure:

• Spray pattern uniformity
• Flow rate (cc/min)
• Leak-down after closing

DIY diagnosis limitations: While you can perform basic checks at home, proper diagnosis often requires professional equipment. Many auto parts stores offer free code scanning, which gives you a starting point.

Preventing Fuel Injector Problems

An ounce of prevention is worth a pound of cure, especially when that cure costs $1,000+:

Essential maintenance to protect your injectors:

1. Use quality fuel from reputable stations: Top Tier gasoline contains detergents that keep injectors clean. Avoid sketchy gas stations with very low prices.
2. Change your fuel filter on schedule: Usually every 30,000-50,000 miles. A clogged fuel filter allows debris to reach injectors.
3. Use fuel injector cleaner preventatively: Add a bottle every 5,000-10,000 miles as maintenance, even if the engine runs fine.
4. Don’t run your tank near empty: The bottom of your fuel tank collects sediment and debris. Running on fumes sucks this garbage into your fuel system.
5. Replace fuel regularly in stored vehicles: If your car sits for months, old fuel develops varnish and gum that clogs injectors. Add fuel stabilizer for storage.
6. Address check engine lights promptly: Small problems (like one misfiring cylinder) become big problems if ignored. One bad injector can damage your catalytic converter.
7. Consider Italian tune-ups: Occasional hard acceleration (when safe and legal) can help burn off carbon deposits before they become problematic.

The financial argument: A bottle of fuel injector cleaner costs $12-20. A fuel filter costs $15-30. Compare that to $1,000+ for fuel injector replacement. Preventative maintenance is always cheaper.

Can You Drive With Bad Fuel Injectors?

Technically you can drive with bad injectors, but you absolutely shouldn’t for several important reasons:

Why continuing to drive is a bad idea:

1. Wasted fuel: Poor fuel economy from bad injectors might cost you $50-100 extra per month in wasted gas
2. Catalytic converter damage: Running rich destroys catalytic converters ($1,000-2,500 replacement)
3. Engine damage risk: Misfires can cause unburned fuel to wash oil off cylinder walls, increasing engine wear
4. Diluted engine oil: Leaking injectors can thin your oil with fuel, destroying lubrication and damaging bearings
5. Safety concerns: Severe misfires and power loss create dangerous situations on highways
6. Failed emissions: You can’t register your vehicle in most states with check engine lights and failed emissions
7. Progressive damage: Bad injectors get worse over time, never better. Waiting only increases repair costs.

How long can you drive? Maybe days, maybe weeks, depending on severity. But the real question isn’t “how long can you” but “why would you want to” when the cumulative damage and wasted fuel quickly exceed repair costs.

The limp mode possibility: Some vehicles enter “limp mode” (severely reduced power) when injectors fail badly. This is your car’s computer protecting the engine. In limp mode, you can barely accelerate and usually can’t exceed 35-45 MPH—just enough to limp to a repair shop.

The Bottom Line

Bad fuel injectors typically announce themselves through rough idle, engine misfires, poor fuel economy, and a check engine light with misfire or injector circuit codes. While these symptoms can be caused by other issues, fuel injectors are one of the most common culprits—especially if you’ve been neglecting fuel system maintenance.

The good news? Try a bottle of quality fuel injector cleaner first ($12-20). It solves the problem 60-70% of the time if you catch it early. If that doesn’t work, professional cleaning costs $50-150. Only if those fail do you need to consider replacement ($300-1,500+).

Don’t ignore fuel injector problems. The wasted fuel alone will cost you more than the repair, and you risk expensive damage to your catalytic converter ($1,000-2,500) or engine if you let it go too long. Address symptoms as soon as they appear, and you’ll save money and headaches.

Regular maintenance tip: Use fuel injector cleaner every 5,000-10,000 miles preventatively. Change your fuel filter on schedule. Use quality fuel. These simple steps can prevent most injector problems and extend their life to 150,000+ miles.

Frequently Asked Questions About Bad Fuel Injectors

How do I know if my fuel injectors are bad?

The most common signs are rough idle with noticeable engine vibration, engine misfires (especially on specific cylinders), dramatically poor fuel economy (15-30% worse), a check engine light with codes P0300-P0308 (misfires) or P0201-P0212 (injector circuits), difficulty starting, loss of power during acceleration, and black smoke from the exhaust. Multiple symptoms appearing together strongly indicate injector problems.

Can you clean fuel injectors or do they need replacement?

Many fuel injector problems can be fixed with cleaning if caught early. Pour-in fuel injector cleaners ($10-20) solve problems about 60-70% of the time for mild to moderate clogging. Professional cleaning services ($50-150) have 70-80% success rates. Only if cleaning fails after 2-3 attempts, or if you have injector circuit codes (P0201-P0212) indicating electrical failure, do you need replacement. Physical damage like external leaks also requires replacement.

How much does it cost to replace fuel injectors?

Fuel injector replacement costs vary significantly by vehicle. Per-injector costs range from $30-80 (aftermarket) to $100-300 (OEM). Labor costs $100-700 depending on engine accessibility. Total repair costs: 4-cylinder engines $400-1,200, V6 engines $600-1,800, V8 engines $800-2,500, and luxury vehicles $1,500-4,000+. Many mechanics recommend replacing all injectors together on high-mileage engines since labor cost is nearly the same.

Can bad fuel injectors damage your engine?

Yes, bad fuel injectors can cause serious secondary damage if ignored. Running too rich destroys catalytic converters ($1,000-2,500 replacement). Misfires can wash oil off cylinder walls, increasing engine wear. Leaking injectors can dilute engine oil with fuel, destroying lubrication and damaging bearings. Engine knock from incorrect fuel mixtures can crack pistons and damage head gaskets. The wasted fuel and potential damage far exceed the cost of fixing bad injectors promptly.

Will bad fuel injectors throw a check engine light?

Yes, bad fuel injectors almost always trigger the check engine light with specific codes. Common codes include P0300-P0308 for misfires (often caused by clogged or failed injectors), P0201-P0212 for injector circuit malfunctions (electrical problems), and P0171/P0174 (system too lean) or P0172/P0175 (system too rich) for fuel mixture problems. A $20 code reader or free scan at auto parts stores identifies which cylinder is misfiring or which injector circuit has failed.

Can you drive with bad fuel injectors?

You can drive for a limited time, but you shouldn’t. Bad injectors cause wasted fuel ($50-100+ extra per month), risk catalytic converter damage ($1,000-2,500 repair), can damage your engine through misfires and oil dilution, will cause you to fail emissions testing, and create safety hazards from power loss and stalling. Some vehicles enter “limp mode” with failed injectors, severely limiting performance. The cumulative damage and wasted fuel quickly exceed repair costs.

What causes fuel injectors to go bad?

The most common cause is dirty fuel and contamination that clogs injector nozzles. Other causes include cheap or water-contaminated gas, neglected fuel filters allowing debris to reach injectors, normal carbon buildup over time (especially with short trips), age and heat cycle wear, ethanol fuel accelerating corrosion, failed O-rings and seals from heat exposure, and electrical problems from wiring issues or corrosion. Most injectors last 80,000-150,000 miles with proper fuel system maintenance.

How long do fuel injectors last?

Most fuel injectors last 80,000-150,000 miles with proper maintenance, particularly regular fuel filter changes and using quality fuel. Some fail sooner in harsh conditions (contaminated fuel, constant short trips) while well-maintained vehicles might see injectors last 200,000+ miles. Preventative use of fuel injector cleaner every 5,000-10,000 miles can significantly extend injector life by preventing carbon buildup before it becomes problematic.

As an Amazon Associate we earn from qualifying purchases.