Guthrie's Auto Service Inc.
144 COUNTY ROAD 1435 CULLMAN, AL 35058 256.739.1690

General / Misc

Alt + /

Tips on TPS (The Throttle Position Sensor)

When you step on the accelerator, you expect your vehicle to speed up, not slow down.  But, what if it doesn’t?  That can be a big problem. The answer may be a problem with the sensor...
Published on: Aug 17, 2025

Getting Off to a Running Start (Starter Replacement)

When you start your vehicle’s engine, there’s another motor that makes that whole process possible.  It’s called the starter, and it’s a small electric motor that gets you...
Published on: Aug 10, 2025

The Foggiest Idea (Fogged Windows in Cold Weather)

In cold weather, you may notice your windows fogging up. Then you can't see where you're going, and suddenly you and those around you are in danger. So, what causes your windows to fog up in cold weat...
Published on: Jun 08, 2025

The 20.9 Percent Factor (Oxygen Sensor)

Do you know what gas makes up 20.9% of the air we breathe? It's oxygen.   Oxygen is an important part of the combustion process that enables your engine to make power.  The amount of ox...
Published on: Dec 15, 2024

Slippery as Ice (Driving on Wet Leaves)

We all know driving on slippery ice can be dangerous.  What you might not know is that wet leaves can be just as slick. If you live in an area that has trees that drop their leaves, or if you're ...
Published on: Dec 01, 2024

Steamed Up (Vapor Coming Out of Vents)

Sometimes you may notice a little steam or vapor coming out of your vehicle's vents when running the air conditioning or heater.  Is this something about which you need to worry? The answer is i...
Published on: Dec 03, 2023

A Few "Key" Facts (Ignition Key Issues)

You expect your key to turn in your vehicle's ignition.  But sometimes it won't, and that's a problem, whether you're trying to start your vehicle or trying to leave it.  Several things can...
Published on: Sep 12, 2023

MAF Sensor

Air and fuel are mixed together to be burned in your engine. You request how much of each you need by how hard you press on the accelerator, by going up or down a hill or by how much you are carrying ...
Published on: Aug 18, 2023