Exhaust/Emissions

Emissions Repairs in Phoenix

Let our ASE-certified automotive technicians provide exhaust repairs designed to help you pass the emissions test in Phoenix, AZ.

Chances are if you need emissions repair in Phoenix, it means you failed the emissions test at these Arizona-approved facilities. It is possible to get affordable emissions/exhaust repairs done, but it needs to be done by certified professionals to help you pass your re-test.

The technicians at Johnston’s Automotive excel in troubleshooting your emissions problems and providing quick, affordable solutions for emissions failure(s). First, it’s important to remember why Arizona drivers need to get their emissions checked. It’s to help lessen pollution and work towards healthier, cleaner air in metropolitan cities.

Arizona has four different test types, and they are grouped by the vehicle’s age and fuel intake (ethanol vs. diesel). Newer car models may be exempt from full testing, but they fall under a different category allowing their vehicle to be checked with their car’s computer instead of the exhaust system.

If your vehicle is in good working order, it will have no trouble passing the emissions test. A failing score means that there is something going wrong with your vehicle’s exhaust system, which will need to be repaired before being re-evaluated. Failing emissions can also prevent you from re-registering your vehicle at any Arizona’s motor vehicle departments. Here are just a few reasons your vehicle may not achieve a passing emissions score:

Dirty Spark Plugs – Your spark plugs are what initiate the small explosions that keep your vehicle moving forward. Old or dirty spark plugs may cause a misfire, which causes the vehicle’s exhaust to register as “rich”. Changing out your spark plugs will eliminate this issue and lead to higher fuel economy.

Fuel and Air Filters – The fuel and air filters in your vehicle are there to ensure that the correct mix of air and fuel make it into the combustion chamber. If one of these becomes clogged or too dirty, not enough of either, or too much of one will contribute to a failing score.

Oil Change – Dirty engine oil contains a high concentration of Hydrocarbons. This will make your emissions results come back as too rich, and you will fail the test. Changing your oil every 3-5,000 miles will help your engine live longer and will contribute to a passing score.

Inflated Tires – Checking your tire pressure before going in for testing is always a good idea. Under inflated tires will cause your engine to work harder to maintain testing speeds and may affect your score.

It is a good idea to get an engine and fuel-system tune up before going through an emissions test. If you are unsure that your vehicle will achieve a passing score, ask our friendly automotive technicians for a diagnostics evaluation.  We are more than happy to explain the recommended emissions/exhaust repairs to you at our Central Phoenix mechanic shop.