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2005 Trailblazer 4.2 #6 cylinder misfire

Case study on a 4.2l C.O.P engine with a misfire. For more info. on my Ebook go to www.autocomputerstroubleshooting.com How to perform an injector balance test with a scan tool.


 


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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.





How to find a misfire without a scanner 2
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





Trailblazer check engine light on - reading codes and other fun facts
This is the most frequent question that folks axe me about. So, I went out and bought two budget friendly code readers to show you the first things to do when the check engine light comes on. The first code reader is the ELM327 (made by BAFX). You use this with an android phone, along with the torque app. This unit communicates with the phone wirelessly over bluetooth. The second reader is the actron cp9125. No phone required. I bought both of those tools from amazon. They had the best price. The last tool is my GM scan tool. I showed this only to prove that the cheaper tools will pull the same codes that the GM tool does.





How to identify a bad main relay on a Honda (PGM-FI)
1999 Honda Accord No Start (case study) For more on Engine Performance Diagnostics go to my website at www.scannerdanner.com I am doing field work in this video on a 1999 Honda Accord with an intermittent no start complaint. Other symptoms include: stalling, long crank times, surging, bucking, poor transmission shifting.





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