July 2018 Archives - UnderhoodService
Smart Fuel Pump Diagnostics

If you are diagnosing a “cranks but does not run” or a “lean/stumbling under load” complaint, your first instinct might be a problem with the fuel pump. But, how do you assess the condition of the fuel pump without taking it apart?

SKYACTIV Technology: Ultra High-Compression, Direct Injection Engines Are Making Fuel-Economy Waves

The secret to Mazda’s fuel economy gains with its SKYACTIV-G engines is in its approach to combustion management. Diesel engines are typically about 30 percent more efficient than gasoline engines partly because of their significantly higher compression ratios (16:1 or higher for diesels versus 9:1 or 10:1 for most gasoline engines). Raising the compression ratio of a gasoline engine also improves its thermal efficiency, power output and fuel economy.

There Is No Trough: Looking For The Sweet Spot In The Aftermarket

If you looked at U.S. car sales over the past 18 years, you would see a pattern. On either end of the chart, you would see years where 17 million vehicles were sold. In the middle is 2009 when sales dropped to 10 million vehicles. After that is a steady nine-year recovery. Some people call this dip “the trough,” and they think it is hurting aftermarket sales. I think it is an opportunity and a sign of the aftermarket’s future.

Virtual Test-Drives Expedite Autonomous Vehicle Platform Certification

While most people are intuitively cautious about new technology, others ask it to do things it was never intended to do. For example, Tesla drivers using the poorly named autopilot have learned a few lessons in asking a system that’s designed to assist – to be the driver.

Subaru TPMS: Better Service These Direct Systems With Dedicated TPMS Tools

Subaru first started experimenting with TPMS in its vehicles in 2004 with the Subaru Outback and Subaru Legacy. The Subaru B9 Tribeca was outfitted with TPMS in 2006 and the automaker added TPMS to all of its other models in 2008. The TPMS on Subarus are direct systems. In order to properly service and reset these systems, it’s important that a shop invests in a TPMS tool that can interface through the OBDII port.

The Ford 3.5L EcoBoost Engine’s Most Common Problems

Here are the top reasons the engine fails and how to fix it.

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Fuel Trim Theory And Operation

The modern engine measures two things extremely well, the amount of air going into the combustion chamber with the mass airflow (MAF) sensor, and the byproducts that are generated by the combustion event with the oxygen sensor. These measurements allow the engine’s computer to put the right amount of fuel and spark into the cylinder to give the most efficient and cleanest combustion event.

GM Tech Tip: Oil Pressure Gauge Fluctuation After Startup And Over 3700 RPM

The customer may comment that the oil pressure gauge jumps from approximately 40 lb. to 60 lb. three times within the first few minutes of driving as well when the engine revs past 3700 RPM.

Ford Tech Tip: SYNC GEN 1 And GEN 2 Vehicle Health Report Service Ending

Ford has made the decision to discontinue the Vehicle Health Report service for SYNC GEN1 & GEN2 available on 2008-2016 vehicles. Consistent with the terms and conditions in the user agreement and starting August 1st, 2018, this decision will result in the following changes.

Top 10 Changes To Vehicles With Stop/Start Systems

A vehicle with a stop/start system is coming to your bays or might already be there. These systems can improve fuel economy by 3 to 5 percent depending on the driving habits of the customer. For your shop, it is essential to understand what is different on these vehicles and how it might change your diagnostic approach.