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Looking for help with your vehicle? Do you see the dreaded check engine light on? have a problem with your car or truck and need a find a DIY guide? Our collection of How To articles can help you save money and time and get back on the road. No matter what issues in your vehicle you can find the how to tutorial to help you.
Whether you car problems are simple or complex, our guides are here to help. With just a digital multimeter at your side, you can test and diagnose most of your car issues with our How To articles. One of the other tools that is a must have when you want to fix a car yourself is the OBDII scan tool.
These tools quickly connect to your OBDII vehicle to read the Diagnostic Trouble Codes that are stored in your engine computer. Need a How To guide but can't find it in our archive? Leave us a comment or message us and let us know, we'll be glad to help!

Popular FAQ

Split graphic comparing turbocharger boost at sea level and high altitude, showing identical 15 psi boost but greater pressure ratio and turbo speed at elevation.

Does Altitude Affect Turbo Boost and Turbocharger Speed?

Turbo engines handle elevation better than naturally aspirated engines, but maintaining the same boost can require greater pressure ratio and turbo speed.
TOPDON and competing OBD2 diagnostic tools compared on a professional automotive workbench

OBD2 Scanner Brands Compared: TOPDON, Autel, Launch, Innova and ANCEL

We compare the major OBD2 scanner companies by diagnostic depth, bidirectional capability, software costs and the type of owner or technician each brand serves best.

How To Test a Chevy Malibu MAF Sensor

The Chevy Malibu MAF Sensor is also known as the mass air flow sensor. This is a 5 pin unit that is mounted inline with...
2002–2003 Acura RSX K20 fuel pressure test showing the factory 47–52 PSI specification and fuel system components.

What Fuel Pressure Should a 2002–2003 Acura RSX Have?

The 2002–2003 Acura RSX factory fuel pressure specification is 47–52 PSI (320–370 kPa). Here’s how to test K20 fuel pressure and diagnose readings outside the factory range.

How To Prep Car for Paint

Knowing how to properly prepare a car for paint is one of the biggest and most important steps to enjoying a great looking paint...
A wire can look perfect while its copper conductor is broken inside. Learn how to reproduce, locate, confirm and repair an intermittent harness fault

How to Find a Broken Automotive Wire Inside Intact Insulation

A car wire can be broken internally even when its insulation looks completely normal. Repeated bending, engine movement, vibration, heat or tension...

How To Find your Honda Engine Code

This question is a very common one that we are asked frequently, from people who aren't sure of the full four digit engine code...
Performance drivetrain gear-ratio calculation showing how engine RPM, transmission ratio, differential gearing and tire diameter determine vehicle speed.

How to Calculate Vehicle Speed by Gear Ratio, Tire Size and RPM

Choosing a transmission based only on horsepower capacity is one of the easiest ways to build a drivetrain that looks fantastic on...