Articles

12 resources

• ESIM explained: test modes and system boundaries

  Understand the engine-off and engine-running modes described in GoTech’s ESIM article, with a separate 2014 Dodge Dart refueling case.

• 3.6L GM Misfire

  This 2014 Chevy Impala 3.6L had a misfire that was misdiagnosed by multiple shops. Its time to put it through our diagnostic process here at GoTech and get to the root cause of the problem.

• GM 3.6L Timing Chain Diagnosis

  Follow GoTech's GM 3.6L timing-chain diagnostic outline, with related-code context and links to VVT operation and the labscope test.

• GM 3.6L Timing Chain and Reluctor Ring Problems

  Read GoTech's original GM 3.6L timing-chain and reluctor ring discussion, with bulletin illustrations and links to diagnosis and replacement guides.

• GM 3.6L Timing Chain Problems: Symptoms, Codes and Diagnosis

  Understand the symptoms and code context in GoTech's GM 3.6L timing-chain overview, then continue to diagnosis, labscope testing or replacement.

• P0171 and P0174 Lean Trouble Codes

  Learn what P0171 and P0174 trouble codes mean, their symptoms, how to diagnose, and how to correct these codes

• P0172 and P0175 Rich Trouble Codes

  Learn what P0172 and P0175 trouble codes mean, their symptoms, how to diagnose, and how to correct these codes

• P0300 Misfire Trouble Code

  Learn what a P0300 trouble code means, its symptoms, how to diagnose, and how to clear the diagnostic trouble code

• Purge/seal EVAP: understand the monitor sequence

  Follow vacuum generation, sealing, pressure observation and recovery in the GoTech purge/seal explanation. Keep application-specific thresholds separate.

• Split EVAP systems: know which section was tested

  Understand the isolation boundary described in GoTech’s split purge/seal article and why one section’s test cannot establish a whole-system result.

• What is EVAP? Vapor storage, purge and venting

  Learn the roles in a purge/seal EVAP system, then choose a relevant path for repeated nozzle shutoff, P0446 or smoke-test coverage.

• What is Variable Valve Timing (VVT)

  VVT is a system designed to adjust the timing of an engines valves to optimize performance and lower emissions throughout the engines entire operating range