2005 Trailblazer 4.2 #6 cylinder misfire diagnosis (spark and fuel test)

This owner of this truck installed a new plug and coil on the #6 cylinder and still continued to have a misfire. Knowing this information affected my approach. I start this process with an injector balance test and confirmed cylinder compression before moving to the ignition system. Engine Performance Diagnostics chapter 22 Symptoms - misfire (P0306) Fix - repaired corroded power feed wire to the ignition coil Tests shown - fuel injector balance (flow) test - how to test a 3 wire coil over plug ignition coil - coil primary current ramp test with a scope - how to locate an open wire Tools used - fuel pressure gauge - scan tool - inductive low amp probe - digital multimeter Playlist - (Chapter 22) No Spark Troubleshooting, Ignition Coil & Module Testing https://www.youtube.com/playlist?list=PLAFYVCyenqcpihCBcez4sWLv5x2FHNnq- Related videos - Operation and testing coil over plug ignition (4 wire) - Toyota/Lexus https://youtu.be/Nq-54h7z9uU - How to test an ignition coil with a test light (Nissan C.O.P design) https://youtu.be/UwQVg0CtkuQ - How to identify a shorted ignition coil (Honda) https://youtu.be/jfIG0dk_09s - Ignition System Designs, Operation and Testing (an SD Premium video) https://youtu.be/_Ijhi7ai1HY For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book. Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium right here on YouTube. There is a 14 day free trial. On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!

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Trailblazer P0301, Is the coil bad
Chevy Trailblazer P0301, Is the coil bad Here we have a Trailblazer that has a misfire and a P0301 code. I hooked a scanner to the Trailblazer and saw the misfire counter going wild on Cylinder number one. The P0301 code was set because of this misfire . If you had a code reader and saw the P0301 code you could do the same as i done here and move number one coil to a different location.If coil is bad it will then set a new code for the cylinder that is missing. Like a P0302 if moved to cylinder 2 or P0303 if moved to cylinder 3 Always remember also the plug wire or Boot can also be the cause of a misfire . A new coil fixed this miss in the Trailblazer.





Chevy Trailblazer Runs rough, stalls P0014
Chevy TrailBlazer Runs rough, stalls P0014, This is not always the case when a P0014 code shows up , but once in a while i find it to be dirty oil or very low oil level. Sometimes it is the Camshaft Position Actuator Solenoid , either dirty or not working. But good thing to check and even change the oil and filter . The Camshaft Position Actuator Solenoid controls oil flow to the cam components, and controls the timing. This can make a trailblazer run rough at times. So if you are lucky you may be able to just add oil. car repair, p0014,wtbm123





Chevy Trailblazer misfire DIY diagnosis - step one - p0301 p0302 p0303 p0304 p0305 p0306
Here I have a Chevy Trailblazer with a P0302 - cylinder #2 misfire. I show you the basic troubleshooting steps that you can do that only require a code reader and a few hand tools. This procedure can be done regardless of which cylinder is misfiring. First, I swap the coil of the misfiring cylinder with another cylinder. At the same time, I swap the plug of the misfiring cylinder with another cylinder that is NOT the one that I swapped coils with. I then clear the codes and then run the engine. If the misfire moves to the cylinder that I swapped coils with, then I have a bad coil. If the misfire moves to the cylinder that I swapped plugs with, then I have a bad plug. If the misfire stays on the same cylinder, the problem lies elsewhere. Further steps will be shown in future videos. Big thanks to Bill (Kristis Dad) from trailvoy for donating the bad coil!!! UPDATE June 2013 - I know you can also unplug the coils with the engine running to isolate the cylinder. If you want to show that to these guys, how bout YOU make a video. When the average youtube user, who doesn't have much experience doing stuff like that, gets hurt, YOU can live with that on your conscience. I know I couldn't. SMFH.




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