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Tech Feature: Detecting Misfires in OBD II Engines

With OBD II, there’s no missing misfires. Most engine control systems with OBD II monitor the speed of the crankshaft between cylinder firings to detect misfires. More

Tech Tip: GM Mass Air Flow Sensor Failure

Instances of repeated Mass Air Flow (MAF) sensor failure on General Motors applications utilizing the remote-mounted Delco unit can often be traced to an engine back-fire condition. More

Tech Tip: Performing a Fuel System Voltage Drop Test

Airtex offers the following Tech Tip to assist technicians in performing a fuel system voltage drop test. More

Kia Tech Tip: DTC P0460 Update for Sephia Models

The original logic used for DTC P0460 (fuel level sensor circuit malfunction) in 2000 model year Sephias would illuminate the MIL and store a fault code for circuit-related problems (open or short), and for a fuel level input signal that failed to stay within the "plausibility" test limits stored in the ECM. "Plausibility" or "rationality" checks are frequently built into the ECM software to make sure... More

Mitch Schneider: How To Handle Customer Anxiety Over Intermittent Problems

Intermittent automotive service problems are one of the few things capable of terrifying and paralyzing folks on both sides of the service counter. More

Tech Feature: Diagnosing the Blue Car Syndrom of a Random Stalling Condition

Blue Car Syndrome is the non-technical term for a very common phenomenon. It is the experience that many people possess regarding having a specific observation, idea, experience, etc., enter one's consciousness, and then having it seem that the same observation or experience begins to occur with increased frequency. More

Directions: Fueling Your Appetite for Knowledge

In the manual Changes in Gasoline IV, every attempt is made to focus on the auto technician’s areas of interest and to cover current topics. A new chapter on Flex-Fuel Vehicles (FFVs) and E85 has been added, as E85 appears to be emerging as the renewable fuel of choice. More

Tech Feature: Engine Technology Gets a Boost

As a technician, you'll need to understand how Ford's EcoBoost turbocharged gasoline direct injection engine works, since the automaker plans to incorporate it in 90% of its new vehicles over the next three years. More

Tech Tip: Multiple Cylinder Misfire or Rough Idle on Chrysler Models

This bulletin involves rotating all engine exhaust valves, replacing the valve spring retainer locks with a new design to increase valve rotation at lower rpm, inspecting/replacing the MAP sensor (as necessary), and decarbonizing the combustion More

Tech Tip: Poor Throttle Response on VW's Diesel Engine

Condition: Poor throttle response on 1.9L TDI equipped vehicle. Models affected include 1999-2003 Golf and Jetta, 2001-'03 Jetta Wagon and 1998-2003 New Beetle (all ALH, 1.9L TDI engines). More