Accessory Belts, Tensioners And Misfires: A Balancing Act
Ever been amazed how complex some belt routing diagrams can be when all they are driving is an alternator, A/C compressor and maybe a power steering pump? The belt might be 8-feet long and loop around one or two idler pulleys.
Mercedes-Benz: Managing Misfires, Solving Those Strange, Intermittent Engine Vibrations
Automotive Electronics Diagnostician Sergio Fernandez discusses how to solve those strange, intermittent engine vibrations on a 2003 E320, with 3.2L V6 engine and 120,000 miles. The diagnosis begins with these findings: DTC P0305, misfire on cylinder #5; and DTC P0301, misfire on cylinder #1.
New Airtex Vehicle Electronics Video Unlocks Secret to Intermittent Misfires on Dodge Caravan
The technical services team at Airtex Vehicle Electronics was recently presented with a confounding diagnostic challenge on a 2001 Dodge Caravan, and the troubleshooting process and ultimate solution have been captured in a fascinating new diagnostic video available on YouTube.
Diagnostic Solutions: Diagnosing Misfires
Although diagnosing misfires can be a tough assignment for any driveability technician, the diagnosis can be made much simpler if he understands the basics of misfire diagnosis. For example, when the first OBD II misfire monitor was first introduced in 1996, technicians were puzzled by problems with false misfire diagnostic trouble codes (DTCs). Case in point, vehicles being driven on washboard dirt roads began recording false misfires.
Misfires in OBD II Engines: How to Detect
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. The powertrain control module (PCM) notes the relative position of the crankshaft via the crankshaft position sensor (CKP) each time a trigger pulse is sent to the ignition system.
COP Connection: Investigating Common Coil-on Plug Misfires
For a number of reasons, the trend of modern engine management technology is leaning toward using coil-on-plug (COP) ignition systems. One reason is that COP ignitions are very compact and are very adaptable to individual cylinder tuning. With the exception of a few designs that incorporate a driver or “module” into the COP assembly itself,
Tech Tip: Misfires May Cause Engine to Feel Rough, Lack Power and Use More Gas
When you have a misfire code for a particular cylinder, you can focus on one of three things: an ignition problem, a fuel injector problem or a compression problem. Ignition problems that can cause misfires include worn or fouled spark plugs, bad plug wires, moisture on the plugs or plug wires, or a weak or dead ignition coil ….
Tech Tip: Diagnosing Ignition Misfires
A flashing Check Engine light and a P0301 to P0312 diagnostic trouble code is a sure-fire indication 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.
Ignition Misfires
A flashing Check Engine light and a P0301 to P0312 diagnostic trouble code is a sure-fire indication 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
Analyzing Ignition Misfires and Plotting a Diagnostic Course
Uh oh. The Malfunction Indicator Lamp (MIL) is on, and you’ve just found a misfire code. It’s a code P0304, which tells you cylinder number four is misfiring. There are no other codes and the engine has a steady miss. Now what? Misfire diagnosis in this kind of situation should be fairly easy. You have