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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

FAQ : How to Determine Injector Size

Determining what size fuel injectors you need for your project car is a common question we are asked here at Pro Street. No matter...

FAQ : Mitsubishi Evolution X ECU Pinout

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Dial indicator measuring LS1 camshaft end play at the camshaft timing gear

LS1 Camshaft End Play: How to Measure Cam Thrust Clearance

LS1 camshaft end play should measure 0.001–0.012 inch. Learn how to check cam thrust clearance with a dial indicator and why aftermarket timing components can affect the measurement.

K20 Swap Guide – What you need to swap a K20

The Honda K series VTEC engine has certainly been met with mixed results from the enthusiast crowd, but from no fault of...
2002–2003 Acura RSX front brake rotor runout test showing a dial indicator measuring the factory 0.10 mm service limit.

How Much Brake Rotor Runout Is Allowed on a 2002–2003 Acura RSX?

Think your Acura RSX has warped rotors? Honda specifies a 0.10 mm front brake-disc runout limit. Here's how to measure it correctly.

How To Test a Dodge Neon Cam Sensor

The Dodge Neon cam sensor is a vital part of how your 2.0 liter engine works. When you turn on your 2.0 liter Neon...
Automotive wiring load test showing 12 volts with no load and voltage collapsing under load due to a corroded high-resistance connector.

How to Load-Test Automotive Wiring: Why 12 Volts Doesn’t Mean the Circuit Is Good

Seeing 12 volts at a connector doesn't prove the circuit is healthy. Learn how automotive wiring load tests expose corrosion, weak terminals, damaged wires and other hidden resistance.

How To Service your 2JZ TPS

You finally got your 2JZGTE or 1JZ engine swap into your car and the moment of truth is upon you. You try to crank...