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Muffler repair & exhaust

Muffler Repair & Exhaust Repair done right! AA Auto Repair in El Cajon, CA is your neighbor for complex and routine auto repair.

(619) 448-5800

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Muffler repair &
Car exhaust

Finding out that your vehicle needs a new exhaust system can come as a shock and are second guessing the importance of actually fixing your exhaust problems.

Your exhaust system not only controls harmful emissions but helps maintain the safe operation of your vehicle. It is important to remember that keeping your vehicle performing at a high level is a top concern is very important because damage to other systems can sometimes occurr and exponentually increase the cost of a simple initial repair.

Wear defects requiring vehicle exhaust system replacement include:

  • Exhaust Pipe Leaks

Leaks in the exhaust system can effect fuel economy and create an excessively noisy system. A more serious problem is the risk of carbon monoxide poisoning.

  • Corrosion Holes

The product of wear & tear and road conditions, a corrosion hole can lead to dangerous gases leaking into the cabin of the vehicle and into the atmosphere.

  • Puncture

(other than a drain hole) Rocks, potholes and other road debris can cause punctures in the exhaust system that can lead to excessive noise and dangerous gases leaking.

  • Open Muffler or Split Pipes

Cracks in the seams of the exhaust system can cause dangerous gas leaks, excessive noise and increased emissions.

  • Flexible Couplers Leaking

Leaks in the flexible coupler can cause excessive noise, decreased engine performance and leaking of dangerous gases.

  • Distorted body shell

Misshapen muffler shell and piping can affect the performance and/or structural integrity of exhaust system components.

  • Missing components

Missing parts can create leaks and diminish the performance of the exhaust system, leading to problems like reduced gas mileage and increased emissions.

  • Cracked or broken mounting brackets

Failing mounting brackets can lead to key components coming loose and, in extreme cases, falling off the vehicle.

  • Rattling or knocking noise from muffler

Rattles or knocking coming from the muffler could be a sign that an internal weld has broken and could affect the flow, tone and performance of the muffler.

  • Converter restriction

A clogged or restricted catalytic converter can cause decreased or sluggish engine performance and increased emissions out of the tailpipe. If you are not sure always side in the area of caution. Any mechanic including AA Auto Repairs & Tires will look at it for free and give you the best solution and the ramifications of waiting. Also, maybe a second opinion is a good idea too.


AA Auto Repair & Tires wants to make sure you don’t spend unnessary dollars on un-needed service. Check out some of our Frequently Asked Questions regarding Brake Service

What Does It Mean When My Brakes Squeak?

Brake pads are built with a special feature that?s automatically activated when they have worn out past their useful life.

Simply, a metal tab or blade is attached to the brake pad, where it hovers just above the brake rotor. As the brake pads wear out (just like your pencil eraser), they get thinner, which brings the metal tab closer and closer to the metal brake rotor.

At some point, the brake pad material will hit its minimum safe thickness. Here, the metal tab physically contacts the metal brake rotor, where it generates an irritating squealing sound. This is an audible signal from your brakes that it?s time to replace those worn out brake pads.

Just remember that brakes sometimes squeal or squeak, but not as a result of component wear. In any case, drivers should have their brakes inspected to determine the root cause of any unexpected noise.

How do i know my muffler is broken?

Muffler Sounds Funny or Loud:

If you think that your muffler may be wearing out, the sound is your first indicator. If your engine has gotten a little bit louder lately, there?s a good chance that you need to thoroughly inspect the exhaust system.

The muffler is often the culprit when it comes to exhaust problems, you should check out the entire system front to back to be sure.

On older cars, the muffler may have been replaced two or three times but the rest of the exhaust system like the resonator or the catalytic converter. If this is the case, it might be time for one of those components to fail even though the muffler is still solid. Use your intuition, and always err on the side of caution. Remember, an exhaust leak could lead to build up of carbon monoxide inside your car or truck, a situation that can be deadly.

Muffler Smells Strong in Car:

You should really never smell your car?s exhaust while you?re driving along the road or sitting at a traffic light.

When there?s a leak in your exhaust system someplace or a hole in your rusty muffler, exhaust gases will leak out and drift upward into your car or truck?s interior. The exhaust is flowing quickly and is under pressure, so even a small perforation in the exhaust system can pump a lot of exhaust out.

This can create a dangerous carbon monoxide situation. If you think you’re smelling exhaust in the cabin of your car or truck, have the exhaust system inspected right away.

Muffler has Holes or is Falling Apart:

Taking a solid look at your muffler and exhaust system is your last line of defense against an exhaust leak. Let it cool for at least an hour before you crawl around underneath or you could suffer a serious burn.

To inspect the exhaust system, start at the tail pipe and work your way forward. You’re looking for any obvious holes or splits in the system.

Areas of obvious rust are problem zones that may be hiding a hole or two. The muffler itself will tend to leak at its manufacturing seams. This means the rim of both ends, the seam along the center, and the points where the pipes enter and exit the muffler. The same goes for your resonator, catalytic converter, and flex pipe or pipes.

If you have access to a lift, you can look for an exhaust leak by feeling for leaks with the engine on, but be sure to do this in the company of a seasoned pro as burns are a real possibility.

Are after market muffler kits better for my car?

Maximize your engine power of your car or truck with a performance exhaust system. AA Auto Repair & Tires loves supin’ cars and we are experts. In fact we do a lot of legal racing ourselves. We can point you in the right way to get your car on the right “track” for performance.

Exhaust system kits make it possible to upgrade any factory or OEM exhaust system. Compare the best performance exhaust system kits for cars and trucks by respected brands such as aFe, Dynomax, Flowmaster and MagnaFlow. Some of the most popular systems include the Flowmaster American Thunder system, Dynomax Ultra Flo and street and off-road systems designed by MagnaFlow.
They will definitely allow your car to perform stronger, but they will be a little bit louder if that doesn’t bother you.

How long will a muffler last?
The typical lifespan of a muffler differs according to the car model and the overall vehicle use. Vehicles that are on the road more will experience more wear and tear to the undercarriage of the car. Typically, a car muffler will last 40,000 to 80,000 miles or around two to four years.
How long will a catalytic converter last?
A new catalytic converter should last for around 10 years but, as with most other vehicle components, the exact lifespan can differ. Mileage and engine tune can impact on the durability of the item, so it’s worth checking the condition after 50,000 miles.
Why is my car have a lot of black smoke from exhaust?
1. Clogged Air Filters

With dust blocking the air filter, there are chances that sufficient air amount is not reaching the cylinder. As a result, more fuel is being burnt. And, ultimately this causes?black smoke from exhaust?irrespective of the fact that the fuel injectors are working properly.

Besides this, due to the heavy load or during hard acceleration also black smoke can be found, as the fuel is not injected at the right time.

2. Damaged Fuel Injectors

In case of the good fuel injector, the fuel is properly atomized, which means the fine droplets of fuel are spreading equally in the cylinder. However, if the injectors don?t close on time or they are clogged, there are chances that more fuel is injected in a certain area called as rich mixture area of the car. In this situation, even the amount of air is insufficient for the combustion of fuel due to blocked injectors (and the few opened ones inject only fuel).]

3. Faulty MAF Sensors

The work of Mass Airflow sensor is to determine the volume of air entering the engine, which in turn, helps in measuring the amount of fuel to be injected inside the cylinder. This entire functioning is important for the complete combustion of fuel in the engine. Otherwise, a malfunctioning MAF sensor can lead to poor performing engine.

4. Bad EGR Valve

The EGR reduces emission of nitrogen oxides by re-circulating portion of an engine?s exhaust gas to the internal combustion engine. If this component is damaged, it emits all the?black smoke out of exhaust.

5. Damaged Piston Rings

One possible reason behindblack smoke from exhaust?pipe is damaged piston rings. Piston Rings are designed to prevent the infiltration of engine oil inside the combustion chamber. If there is any problem with the piston rings, the engine oil starts flowing into the combustion chamber. The combustion of the mixture of this engine oil and the fuel delivers black smoke.

6. Engine Deposits

Engine deposits are another reason causing?black smoke from tailpipe. When the engine is new, it will run fluently without any problems. But after a long period of use, the engine conditions get worse and worse and this consists of ?getting accumulations of combustion product in important areas like combustion chambers and injectors. And these interfere with best functioning.

Car Exhaust prices

AA Auto Repair & Tires wants to make sure you don’t spend unnessary dollars on un-needed service. Check out some of our Frequently Asked Questions regarding your cars Muffler or Exhaust.

Let's Get Started

We want your business! AA Auto Repair & Tires has been the leader in Car Repair Services in East County for over 2 decades. Give us a call so we can win you over too with our exemplary professional automotive services. Even if you just need an Oil Change we’ve got your back and your cars.




Mufflers are installed within the exhaust system of most internal combustion engines. The muffler is engineered as an acoustic device to reduce the loudness of the sound pressure created by the engine by acoustic quieting. The noise of the burning-hot exhaust gas exiting the engine at high velocity is abated by a series of passages and chambers lined with roving fiberglass insulation and/or resonating chambers harmonically tuned to cause destructive interference, wherein opposite sound waves cancel each other out.



catalytic converter

Are used in exhaust systems to provide a site for the oxidation and reduction of toxic by-products (like nitrogen oxides, carbon monoxide, and hydrocarbons) of fuel into less hazardous substances such as carbon dioxide, water vapor, and nitrogen gas.



Similar to the muffler, this component changes the sound vibrations from the engine and can be placed either before or after the muffler in the exhaust system. TheRose Monroe task of the resonator is to organize and tune vibration sounds but also plays a big role in improving exhaust flow effectiveness. Just like a well-designed, functioning muffler, this can lead to better performance and fuel efficiency.


Tail Pipe

As the last piece of the exhaust system, the tailpipe comes out of the muffler and extends past the rear bumper of most vehicles, directing exhaust gases out and away. On many modern-day cars, it also serves as a decorative feature and may be dipped in chrome.?


exhaust manifold

Collects exhaust gases from each cylinder from the combustion chamber of the engine and directs them into the exhaust pipe. Usually made of cast iron or steel with special bends to increase efficiency.


In El Cajon, CA

Providing Superior Auto Repair in El Cajon, CA for close to 30 years!

We handle all your Domestic and Foreign Car problems. No job is too big or too small. Our highly skilled mechanics are there for you.

Bring us your tough car problems and we will be able to find an economical solution for you and your family.


In El Cajon, CA

Save thousands of dollars by making sure your car is kept in tip-top condition. By performing routine maintenance on your car you will save time and most importantly your hard earned cash.

If you are hessitant to work on your car ask one of our technicians about our Car Maintenance Quarterly Service. This service provides top to bottom routine inspections for your car!