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Tech Tip: Ticking or Knocking Noise Coming from Some Ford Catalytic Converters

Some 1997-2003 F-150 vehicles equipped with any engine, and 1997-’98 F-250 LD vehicles equipped with the 5.4L engine, may exhibit a ticking or knocking noise coming from the catalytic 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

Catalytic Converter Tech Feature: Diagnosing P0420 or P0430 DTCs

Although modern OBD II technology has simplified catalytic converter diagnostics, it's still important to understand the basics of catalytic converter operation when dealing with a P0420 or P0430 DTC. Gary Goms explores the basics of catalytic converter chemistry and summarizes how common converter failures can be diagnosed. More

Code P0420: The Dreaded Diagnostics of Catalytic Converter Replacement and Oxygen Sensors

You just pulled a P0420 from a vehicle indicating the catalyst system efficiency for one of the banks is below threshold. What is next? Could it be just the oxygen sensor? Or, could it be the catalytic converter? These articles will help you understand why the OBDII code was set and what further test must be performed to determine the root of the problem like a coolant leak, oil blow by or other problems... More

Tech Feature: Curbing Catalytic Converter Thefts

Catalytic converters have been disappearing at an alarming rate. The theft of these emission control devices is being perpetrated by sleazeballs looking for easy money. A thief can hock a pilfered converter for $25 to as much as $100 depending on the value of the precious metals inside it. More

Tech Tips: Kia Muffler Pipe Drain

This bulletin provides information related to a reported "no-start" condition on some Sportage models after they're parked overnight in areas where the temperature is below freezing. More

Nissan: Repair of Exhaust Leak/Noise at Front Tube

If you confirm that a 2002-'03 Pathfinder has an exhaust leak or noise coming from the front tube(s), inspect both front tubes for cracking at the welded side seams. More

Tech Tip: Wave Dynamics for Headers and Pipes

Depending upon the market to which an import shop might be catering, the term "performance exhaust" can have two different meanings. The first market actively seeks out the throaty rumble and chrome-plated look as part of the street-driving scene. The second market installs an exhaust system that produces the most horsepower for a performance application. Sometimes the two markets are identical and... More

Tech Feature: Understanding Your Market Can Increase Performance Exhaust Revenue

Depending upon the market your shop is servicing, the term "performance exhaust" can have different meanings. The first market actively seeks out the throaty rumble and chrome-plated look as part of the "vehicle personalization" scene. The second installs an exhaust system that produces the most horsepower for a performance application. Sometimes the two are one and the same, sometimes they're not... More

Tech Tip: Nissan Exhaust Buzz/Rattle on Acceleration

If you confirm that there is an exhaust rattle/buzzing noise that sounds like it's coming from the front exhaust tube on an applied vehicle, take the following actions. First, inspect both of the catalyst front tube support brackets for breaks, cracks or missing bolts. If you determine that the support brackets need to be replaced .... More