Tech Tip: Diagnosing Subaru Cooler Weather and Driveability Complaints – UnderhoodService

Tech Tip: Diagnosing Subaru Cooler Weather and Driveability Complaints

As the winter season approaches, cooler weather becomes apparent in many parts of the country. With this cooler weather comes the common cool-weather-related driveability complaints.

As the winter season approaches, cooler weather becomes apparent in many parts of the country. With this cooler weather comes the common cool-weather-related driveability complaints.

Before you jump to any conclusions about a customer complaint, remember these points:
1. No vehicle runs as good cold as it does when it’s at normal operating temperature.
2. The customer has been operating the vehicle in more moderate temperatures for the past few months and has gotten accustomed to the way it has been running. Now, in cold weather, things are just not going to work the same.
3. Many areas of the country are still using gasoline blended for warmer temperatures and these fuels normally don’t atomize well in cooler temperatures.
4. Oxygenated and reformulated fuels that are in use in many parts of the country are normally harder to ignite in cold cylinders.
5. Many drivers get their gas at one station because it may be close to work or home. Question them about this and, if it’s true, suggest that they try a different brand of gas. (It may take a couple of tanks for them to notice any improvement.) Various manufacturers blend their fuels differently.
6. The 4EAT has a temperature sensor in the ATF and the Transmission Control Unit (TCU) will not allow an upshift into 4th gear until the ATF has reached a specified temperature range.

There are many reasons for a customer to complain of a driveability problem during cooler weather. The above points are the most common ones that the Technical Support Line deals with on a regular basis.

Technical service bulletin courtesy of Mitchell 1.

For more information on Mitchell 1 products and services, automotive professionals can log onto the company’s website at www.mitchell1.com.

You May Also Like

Wallbox Announces Milestones in Acquisition of ABL

The company says the move has already paid off in the effort to support the EV transition.

Wallbox announced a number of milestones since its acquisition of ABL. According to the company, the move has already paid off in the effort to support the EV transition."We are immensely proud of what we have achieved in the first six months following Wallbox’s acquisition of ABL," said Jaume Ferre, Co-CEO of ABL and CTO of Wallbox. "The synergies between our companies have allowed us to move forward quickly with product integrations. We only expect this cadence to continue and to strengthen our ability to set new standards for innovation, reliability and customer experience."

Standard Motor Products Introduces 200 New Numbers

The release provides new coverage in 60 distinct product categories and 75 part numbers for 2023 and 2024 model-year vehicles.

Child Labor for Repair Shops

This could be a chance to introduce teenagers to the auto care industry.

Autel Energy Unveils Megawatt Charging System at ACT Expo

The MaxiCharger Megawatt Charging System is designed for heavy-duty electric trucks.

The Vital Nature of Multi-V Belt Systems

From the alternator to A/C, the multi-v belt uses a truck’s engine to operate crucial components. Here’s how to keep things running smoothly.

Other Posts

Mullen Continues Commercial EV Dealer Expansion in Midwest

New franchise partners Ziegler Truck Group and Range Truck Group will focus on the Pacific Northwest and upper Midwest regions of the U.S.

Non-Competes: A Non-Starter, Says FTC

The FTC’s rule is set to take effect in about four months, unless it is blocked by legal challenges.

Navigating The Legal Landscape with Succession Planning

Planning for a successful business handover means doing things by the book.

PRT Launches 59 New Complete Strut Assemblies

Extending PRT’s product portfolio in North America, the new release represents nearly 12M vehicles in new coverage.