top of page


In today’s cars that are computer controlled, the definition of a tune up has really changed. Generally, a tune-up consists of checking the engine for parts that need cleaning, fixing, or replacing. Malfunctions on a vehicle can be camouflaged by the computer, whose function is to keep the engine running as efficiently as possible for as long as possible. It will signal a Service Engine Soon, or Check Engine Light when it detects a problem. But it will try to compensate for that problem at the same time, so the vehicle will still run fairly decent.

One thing you’ll find is a maintenance schedule. Your automobile’s manufacturer worked out a detailed schedule of all the services your car needs to keep running for a long time.These are designed to be performed preventatively so that the parts do not fail prior to replacement. Some common mileage intervals and maintenance recommended is as follows:

Every 3,000 miles:

Replace oil (synthetic oil every 5,000 miles)
Replace oil filter 
Inspect air filter – replace as needed
Check and top off all fluids
Check tire pressure

Tire rotation

Every 15,000 miles:

Replace wiper blades
Replace cabin air filter

Every 30,000 miles:

Replace automatic transmission fluid
Replace automatic transmission filter
Flush cooling system
Replace PCV valve (recommend whenever spark plug replacement interval is)
Replace spark plugs (vehicles with non platinum spark plugs)

Replace fuel filter
Fuel Injection and Carbon Clean Service

Every 50,000 miles:

Replace fluids for:
Manual transmission
Transfer case
Power steering

Brake fluid

Every 60,000 miles:

Replace PCV valve
Replace spark plugs (this includes vehicles equipped with platinum spark plugs)
Replace spark plug wires
Replace timing belt (this varies per manufacturers specifications on your vehicle)

If you detect a change in your car performance call A to Z Express Mobile Mechanics right away!

  • Hard Starting. The most common car trouble, usually due to neglected maintenance. If the starter cranks the engine, the electrical system is probably okay. The problem could be as simple as a starting sensor (or the choke mechanism if applicable).

  • Knocking. A noise usually heard when the engine is "under load," like during acceleration or climbing a hill. It can be caused by inferior fuel, but is often a sign your engine needs attention. Many cars now have knock sensors built in to correct minor problems, but they can't compensate for larger malfunctions that could result in engine damage.

  • Rough Running. This can be caused by a problem in the fuel or ignition system, or a troubled valve or piston. Tell your technician when it occurs: When idling? During acceleration? At all speeds?

  • Poor Gas Mileage. Keep track of your mileage. Changes may be due to under inflated tires, engine running too cold, transmission malfunction, dragging brakes or misaligned wheels.

  • Stalling. Causes can include incorrect idle speed, adjustments, malfunctioning sensor or switch, dirty fuel system parts, worn spark plugs or other engine deficiencies. Take note: Does the engine stall when hot? Cold? With air conditioning on?

  • Dieseling. Also known as "after-run." The engine keeps chugging and coughing for a few seconds after you shut off the ignition. Causes can range from inferior gasoline and high idle speed to carbon in the combustion chamber.

  • Power Loss. A dirty fuel filter commonly causes power loss. Preventative maintenance can help.


Tune Up: About
bottom of page