Auto Repair Questions - Free Help - Expert Mechanics

Today's auto repair industry requires more electrical equipment, training and know how to diagnose car problems than ever before. Here on this website you will find free car and truck repair help, questions answered, advice, pictures and videos.


Have you had the experience of a mechanic replaced a part, did not fix the car, then guessed at another item. Maybe you read some free repair help online? When that did not repair the car, the usual response is:  "Well, gonna have to take it to the dealer".

THAT'S WHERE WE COME IN.

We have been ASE Certified Dealership Technicians for over 20 years each.

The day to day job of auto repair has become more difficult. Our customers seem to understand that most car repairs cannot be done by the backyard mechanic anymore.

Find your vehicle make from the menu at the top of this page to browse our articles.

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Thank you to our friends at The Transmission Repair Shop - Dallas for their help on this website.

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How Things Work

Evaporative Emission System Operation and Components

The Evaporative Emission (EVAP) control system limits the fuel vapors from escaping into the atmosphere. The EVAP transfers the fuel vapors from the sealed fuel tank to an activated carbon (charcoal) storage device (EVAP canister). The EVAP canister stores the vapors until the engine is able to use the extra fuel vapor. When the engine is able to use the extra fuel vapor,

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Common Engine Codes

Electronic Throttle Actuator Control Codes

P0506 - P0507
The Electronic Throttle Control (ETC) System uses various inputs from the powertrain control module (PCM). This system uses the inputs to control the idle speed through serial data circuits to the throttle actuator control (TAC) module.

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