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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!

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2005 Subaru STI ECU Pinouts

We break down the relevant STI ECU Pinout for the 2005 Subaru WRX STI, and show you what wires you will need if you are...
Honda performance sedan and Nissan Z connected to a shared central computer, zone ECUs and vehicle-software architecture planned for 2029.

Honda and Nissan Will Share ECUs and Vehicle Software Starting in 2029

Honda and Nissan will jointly develop central computers, zone ECUs, operating systems and vehicle-control software for next-generation cars.
NHTSA is investigating nearly one million GM vehicles after L87 6.2L V8 engines reportedly continued failing following recall repairs.

GM’s 6.2L V8 Recall Fix May Not Be Working — What L87 Owners Need...

General Motors' troubled 6.2-liter L87 V8 is back under federal scrutiny, and this time the issue isn't simply engines that failed before...

How To Test a Chevy Astro MAP Sensor

When your Chevy Astro MAP sensor is beginning to go bad, you can use this handy How To Guide to test it. The MAP (Manifold...

Best Junkyard Turbos and How to Find them

Putting together a homemade turbo kit from junkyard turbos is one of the oldest tricks in the book. Most aftermarket turbochargers can cost you...
1980s and 1990s performance cars gathering at Gold Bar Hangar for RADwood NorCal 2026 in Alameda

RADwood NorCal Returns With Free Admission, Full-Throttle Flybys and a $100K Build Challenge

RADwood NorCal returns October 24 with free admission, hundreds of retro vehicles, full-throttle runway demonstrations and a $100,000 creator build challenge.
California used-car buyer reviewing dealership paperwork under the new three-day CARS Act cancellation law

California’s New Three-Day Used-Car Return Law Is Now in Effect

California’s new CARS Act gives eligible used-car buyers three days to return vehicles priced under $50,000. Here’s how the mileage limit, fees, refunds and dealer requirements work.
LS1 aluminum engine block showing factory 3.898-inch bore, .030-inch overbore, cylinder sleeve thickness, and core shift.

How Far Can You Bore an LS1 Block? Safe LS1 Overbore Limits Explained

The Chevrolet LS1 responds remarkably well to modifications, but there is one performance trick where enthusiasm can quickly turn an aluminum block...