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.
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.
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
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.
1999 Dodge Avenger Misfire Case Study
A good review of Sections 21 and 22 of my eBook available at
In this video I show how to properly troubleshoot a misfire condition
caused by a misadjusted crankshaft position sensor.
How to check for a jumped timing chain or belt
This video can be used to support Section 1 pages 17-23 in my ebook.
The method of timing verification shown in this video can be used on any
car. Even on old school, non-computer controlled systems. I am also showing
in this video how to properly align the timing chains on a 2003 Suzuki
2000 Ford Focus EGR System Tests
For those of you that have my eBook, you can follow along in Section 3
"Transistor Drivers and Output Solenoids" for the EVR solenoid testing that
I am doing. Also Section 24 "EGR Systems" for more details on this system.
For those of you that don't have my eBook yet, you can purchase it at
Identifying type of misfire using tailpipe emissions
One of the causes of a misfire is an injector that is not opening. This is
an effective method of identifying that condition. This is NOT a useful
test in determining injector flow problems as this would cause lean
misfiring and elevated HC levels. This is only useful for no fuel misfire
I think this will help you guys in understanding the direction we took on
a case study EricTheCarGuy and I did.