To keep your vehicle running at peak performance, we provide the following Brake Services:

• Brake Pad & Shoe Replacement
• Resurface Rotors
• Caliper Replacement
• Brake Hoses
• Brake Fluid Flushes
• Wheel Bearings
• Anti-Lock Brake System
• Brake System Performance Upgrades

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Our miscellaneous auto services include:

• After hours drop off
• Fuel economy inspection
• Authorized Jasper dealer
• We offer most major brands of tires
• Pre-purchase inspections
• Pre trip inspection
• RV repair
• Trailer hitches and wiring
• Most extended warranties accepted

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Our towing services include:

• Towing to Shop Only

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Our heavy duty services include:

• Engine Replacement
• Maintenance

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Our internal engine services include:

• Cylinder Block
• Cylinder Head
• Timing

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Diagnostics

Mechanics at M & R Auto are able to diagnose all the electronic parts in your car. For expert diagnostics services on your car’s electronic devices, visit M & R Auto today.

Electrical

Have a dead battery? Misfiring starter or alternator? For all of your auto electrical repair and maintenance needs, come to M & R Auto Repair in Bay City, MI 48706. We service your vehicle with care, providing a high level of workmanship you can trust.

Our auto electrical repair and maintenance services include:

• Batteries
• Starters & Alternators

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Why maintaining your AC System is very important:
Heating and A/C systems may break eventually with usage, hose pipes may clog and drip if not serviced, causing reduced efficiency heating and cooling capabilities. Regular maintenance will keep your AC system operating at peak performance!

Indications your A/C system may be having issues:

• If your air conditioning blows only slightly cooler air compared to the exterior air
• Air that blows in smells damp, musty, or like mildew and mold
• Your cabin does not warm up in cold weather, or is just a little warmer than outside
• The defroster takes longer than typical to operate, or does not operate
• Your heater or A/C only functions when driving, not when idling, or quits blowing when the car is stationary
• Your heating system blows cold air, or the air conditioning blows warm air
• Low airflow even at the highest fan setting.

A comprehensive evaluation of heating and A/C system includes:

• Examining the internal controls and blower
• Checking radiator coolant operating temperature, hoses, pressure radiator cap and thermostat
• Inspecting the compressor belt
• Inspecting system and seals for leaks or various other damages.
• A cooling system pressure test
• Verifying the A/C pressure meets manufacturer specifications
• Measuring the interior vent air temperature

Our repair and maintenance services include:

• Air Conditioning
• Belts & Hoses
• Radiators

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To keep your vehicle running at peak performance, we provide undercar services that include:

• Alignment
• Anti-lock Brakes
• Brakes
• Chassis
• Driveline
• Exhaust
• Shocks
• Tires

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To schedule an appointment or find out more about what we can do for your vehicle, contact us at 989-671-0990.

Our expert auto repair services include:

• Domestic General Repair
• Fleet Repairs
• Import General Repair
• Off-Road Vehicle Repairs

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Our basic auto maintenance services include:

• Ignition
• Ignition Wires & Cables
• Oil, Lube, and Filter
• Spark Plugs

Fuel Injection

The fuel injector, a valve, is an extremely important part of an automobile. The fuel injector increases gas mileage and decreases air pollution by continually changing the amount of gasoline that is mixing with oxygen and being pushed to the engine.

When the fuel injector needs maintenance your car can start having the following symptoms:

• the power to the engine is inconsistent
• the gas milage has decreased
• the automobile is idling unevenly
• fuel scent
• the engine misfires

Our automotive service experts can diagnose and fix most problems including these most common issues:

• Dirty or clogged fuel injector-Fuel additives or microscopic foreign objects that result in an inability to supply gas to the intake manifold or creates a weak spray of gasoline to the engine.
• The valve fails to open or close-A faulty part such as a wire or spring, rust, or fuel additives create blockages or buildup that prevent the valve from opening or closing.
• Leaking-When other parts fail the fuel injector can overheat and stop working.

Distributorless Ignition

The distributorless ignition system (DIS) is a reliable ignition system that eliminates many maintenance issues increasing the intervals between maintenance. The DIS design is unique, instead of a main coil within the engine control unit it has a coil directly attached to each spark plug. These small coils create substantial advantages by controlling the precise spark timing needed to power a car efficiently.

To determine if you need a mechanic and understand what we provide for a DIS please read the following:

I have a distributorless ignition. Does that mean I don’t need regular maintenance?

Our goal is to keep your engine running at peak performance by completing preventative maintenance. The DIS needs fewer maintenance check ups because it does not have a distributor cap or rotor that needs maintenance, but spark plugs can deteriorate, coils weaken, and sensor problems can arise. These issues, along with a worn out PCV valve, or a dirty or damaged fuel filter or air filter, can hinder your engine’s peak performance.

My cars engine isn’t running at peak performance. Is it the distributorless ignition?

Though a DIS is reliable, a failure can occur. If the engine cranks but refuses to start or a cylinder is missing or misfiring there could be a problem with the DIS. Checking the coil is essential to the drivability of your vehicle. If a coil is dead or weak only one or two cylinders in the engine can function at peak performance.

A diagnostic of the DIS module and crankshaft sensor circuit is an important part of our services. When the engine is cranked, but there is an indication of low voltage to the coil pack, there is a problem in the crankshaft sensor circuit. The crankshaft position sensors generally have three terminals, the current feed, one for the ground and an output signal. If these three terminals are not working in tandem there will be no signal, letting us know the sensor has failed.

Other performance problems, such as lack of power, elevated emissions, or poor fuel economy may be a maintenance issue outside of the DIS. When these issues present themselves we complete an elimination check that starts with the individual coils to guarantee their resistance is within specifications. If the coils prove to be acceptable we proceed to the electronic spark control circuit, it may be receiving bad information from another sensor within the engine.

Whether it’s preventative maintenance or a performance issue we will complete a thorough diagnostic test of the DIS, the individual parts, or the surrounding area to ensure your car is operating at peak performance.

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