Tech Tip: Diagnosing a Cylinder that is Misfiring
A flashing Check Engine light and a P0301 to P0312 diagnostic trouble code are sure-fire indicators that one or more cylinders are misfiring. Occasional misfires may pass unnoticed, but a steady misfire is hard to miss. The engine usually feels rough, lacks power and uses more gas than usual. Sometimes a misfire may feel like a vibration. A misfire also will cause a huge increase in hydrocarbon (HC) emissions out the tailpipe, which can cause a vehicle to fail an emissions test.
Carley’s Corner: New Stuff from the AAPEX & SEMA Shows
Having just wrapped up a week in Las Vegas at the AAPEX (Automotive Aftermarket Parts Expo) and SEMA (Specialty Equipment Manufacturers Association) shows, I have some interesting news to report. A company called Green Earth Technologies introduced a new high-quality synthetic motor oil made from dead cows. The oil is made from animal fat (beef
Hybrid Engine Diagnosis & Service
The Toyota Prius and Honda Insight hybrids have been around since 2001; the Honda Accord, Ford Escape and Lexus RX 400h hybrids since 2005; the Honda Civic, Toyota Highlander, Mercury Mariner, Chevrolet Silverado and GMC Sierra hybrids since 2006; and the Lexus GS 450h, Saturn VUE Green Line, Toyota Camry and Nissan Altima hybrids since
Tech Tip: Top 10 Domestic Diagnostic Codes and Fixes
A Check Engine Light that’s illuminated is always a sign that something is wrong. But what? You usually can’t tell until you plug in a code reader or scan tool and read out the code(s) that have turned on the light. At least then you have a starting point for further diagnosis. Some people think a code is all you need to fix a fault and turn off the Check Engine Light. A diagnostic trouble code certainly helps, but it only tells you that some kind of fault has occurred, and maybe the circuit or component associated with the fault.
Who’s at Fault?…Top 10 Domestic Diagnostic Codes & Fixes
A Check Engine Light that’s illuminated is always a sign that something is wrong. But what? You usually can’t tell until you plug in a code reader or scan tool and read out the code(s) that have turned on the light. At least then you have a starting point for further diagnosis. Some people think
Who’s at Fault?…Top 10 Domestic Diagnostic Codes & Fixes
A Check Engine Light that’s illuminated is always a sign that something is wrong. But what? You usually can’t tell until you plug in a code reader or scan tool and read out the code(s) that have turned on the light. At least then you have a starting point for further diagnosis. Some people think
Scan Tools: Scan Tools Offer a Window Into a Vehicle’s Inner Workings
Scan Tools Offer a Window Into a Vehicle’s Inner Workings Larry Carley, Technical Editor [email protected] Technicians who attempt to make driveability or emissions repairs today without a scan tool are troubleshooting in the dark. A scan tool is absolutely essential because it provides a window into the inner workings of the engine management and onboard
Hybrids: Service & Diagnostics
What do you do when a customer with a Toyota Prius hybrid says his Check Engine light is on and wants you to diagnose his problem? Can you do it? Or, would you send your customer back to the Toyota dealer? To help alleviate anxiety over the complexity and reliability of its hybrid systems, Toyota
40 years of the Mazda Rotary Engine
On May 30, 1967, Mazda launched the world’s first twin-rotor rotary-engined car, the Mazda Cosmo Sport. The company now celebrates that engine’s 40th anniversary. In these past 40 years Mazda has produced nearly 2 million vehicles powered by the rotary engine. It was not until 1970, however, that Mazda sold rotary-engine-equipped cars in the United
Flashing Signals / Reprogramming PCMs
You don’t have to be Microsoft A+ certified to flash reprogram automotive PCMs, but the process requires a certain amount of know-how as well as special tools and access to the latest OEM software upgrades (which are not free!). What’s more, it’s not a risk-free endeavor. Certain precautions must be undertaken before you begin, and