Using Fuel Trim to ID Type of Misfire (can it be done?)
I in this video I am comparing two different cars. A 2000 Lexus RX300 with a wideband O2 sensor and a 2004 Dodge Neon with a narrow band O2 sensor. I created a no fuel misfire and an ignition misfire on both systems. I am NOT teaching wideband/narrow band O2 operation here, just fuel trim reaction to a misfire.
Understanding Fuel Trim
Fuel trim can seem complex at times. But it's really pretty simple. I hope this helps you understand the basics
Secondary Ignition Waveforms (common faults)
In this video, I am showing the following problems:
1. A no fuel misfire
2. An open plug or wire
3. A shorted plug or wire
4. A coil output test
How to test for a bad head-gasket
For more info. on my eBook go to www.scannerdanner.com
This is a review of a test procedure I have in my ebook. Section 1 "Universal Testing Methods" page 13. There are other ways to do this test. I am just showing the one I use the most when looking for a bad head gasket.
How to find a misfire without a scanner 3
Scanners are great tools, but sometimes they aren't any help. That's when understanding the system, and how to test it is all you have. Here are some ways to find the problem
2002 Ford Escape 3.0 Misfire Case Study
Within this video I am covering parts of Section 1 and Section 22 in my eBook available at www.scannerdanner.com. For more on the Picoscope and the WPS500 pressure transducer I am using go to www.picoauto.com.
Cylinder Misfires & Ignition Coil Testing
MotorWeek's Pat Goss shows what to check first when a cylinder misfire code shows up on an OBD scan tool. This includes how to test modern coil on plug ignition coils with a spark tester (available under "Extras" at RockAuto.com).
Using Fuel Trim to ID type of lean condition II
For more on understanding and using fuel trim go to www.scannerdanner.com
I know we have done this before, but seeing it again in a different situation is good re-enforcement of the topic.
Ford MAF Sensor Testing, 12V Power
Ford MAF Sensor Testing, 12V Power
You do not need a Scan Tool to test the Mass Air Flow Sensor on your Ford. Here, we'll walk you through the whole process of testing and troubleshooting the FORD Mass Air FLow sensor, using only a Multimeter.
Although the mass air flow sensor on your Ford is inside the round Air Filter canister assembly and hidden from view, it can be diagnosed in four easy steps.
The Mass Air Flow Sensor on your FORD may have 6 or 4 wires coming out of the Plastic Round Air Filter Box. If the ford mass air flow sensor has 6 wires, this indicates that the Air Temperature Sensor is integrated within the mass air flow sensor itself. If it's a 4 wire sensor, then the Air Temp Sensor is located externally, usually on the Air Duct connecting the Round Air Filter Assembly to the Throttle Body. Get the scoop on testing your FORD MAF sensor.
Presented using advanced software CG animation technology to help you understand. Part of our Automotive Technology series shown here on this channel. Enjoy...
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Dirty MAF Sensor Case Study
2000 Toyota Corolla MAF sensor testing. Using a scanner and labscope.
Trouble code P0171 in memory. How to determine what is causing the engine to run lean.
