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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.





1999 Dodge Avenger Misfire Case Study
A good review of Sections 21 and 22 of my eBook available at www.scannerdanner.com In this video I show how to properly troubleshoot a misfire condition caused by a misadjusted crankshaft position sensor.





How to clean a throttle body and Idle air control valve (iac)
*** PLEASE READ *** In this video demonstration, I show how to get to, remove, clean, and replace the throttle body and idle air control motor (aka IAC) on a 4.2l ford motor. This procedure is the same for any fuel injected vehicle. * * * Check out my website krkvideos.com * * * The vans require removal of alot more stuff just to access the throttle body. A dirty IAC can cause a rough idle. A dirty throttle body can harm performance and cause rough engine operation. When the throttle body or iac is removed a new gasket must be used to properly seal the connection to the intake. GM idle air motors are generally mounted on the throttle body and can be cleaned without removal from the throttle body. This means one less gasket and a lesser chance of creating a vacuum leak. The ford throttle body had a note on it that said it was not to be cleaned because the coating on the throttle blade might be damaged. Thats fine for a new car but that has to be disregarded when working on something that has some miles on it. Subscribe to my channel. * * * Definitions: * * * MAF - Mass Air Flow sensor - Monitors the amount of air the engine is intaking. IAT - Intake Air Temperature - Measures the temperature of the air the engine is intaking. IAC - Idle air control - Controls the amount of air the engine is intaking while it is idling. Throttle body - Responsible for regulating flow of air into the engine as you press the gas pedal. TPS - Throttle position sensor - Tells the computer how far you are opening the blade in the throttle body so it can add more fuel to compensate the added air. * * * Visit krkvideos.com for more! * * * * * * Visit krkvideos.com for more! * * * * * * Visit krkvideos.com for more! * * *





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.





2010 Subaru 2.5 Variable Valve Lift Solenoid and Switch Testing
This video is a great review of Section 2 "Switch Inputs" and Section 3 "Transistor drivers and Output Solenoids" in my eBook. On this system the intake valve lift is varied by two different cam lobes. A low lift lobe and a high lift lobe. I misspoke in the video calling this a variable valve timing or VTEC mechanism. This system does not vary cam timing, but it does vary intake valve lift.





2004 Saturn Ion 2.2 Misfire Case Study (P0300)
To learn more about Engine Performance Diagnostics, go to www.scannerdanner.com This video covers primary ignition operation and coil current ramping on a waste spark ignition system. The engine that is in this Saturn Ion is a Chevy 2.2L Ecotec and is the same engine used in the Chevy Cavalier. Some other highlights of this video: How to use misfire counters on scan data. Transistor operation and testing. Ignition coil current ramp analysis. How to check resistance of an ignition coil on an Ecotec engine. How to check an ignition module with a test light.





P0300 random misfire engine code
Troubleshooting P0300 engine code from a 2003 Chevrolet 3800 .





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 www.autocomputerstroubleshooting.com





Dakota B Joint & T Rod 2





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





2001 Ford 5.4 C.O.P. Misfire
How to troubleshoot a bad coil on a coil over plug system, using a scope and a low amp probe.





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





Test O2 Sensor.mov
An Oxygen sensor can be manually forced down to 0 volts and up to 1 volt. That is it's full range. So, if it will full range it proves that the sensor is good. Here is how to do it





Chevy Trailblazer spark plug replacement 4.2 I6
A how-to video for replacing the spark plugs in a Chevy 4.2 I6 engine. Always use AC Delco 41-103s in this engine. NOTE: The AC Delco 41-103s are pregapped from the factory. That's why they have the plastic sleeve things in the box, so the gap won't change during shipping and handling. For what it's worth, I have replaced hundreds of the delco iridium plugs and haven't gapped a single one. If for peace of mind or whatever you do decide to gap them, do not use the "silver dollar" gap tool (or equivalent). Follow me to GMTNation.com - You're NEW source for Trailblazer/Envoy/Bravada/Rainier/Ascender information and advice. Edit 7/2014 - Sorry looks like I have to close comments on this one too. You guys do know that your commenting history is publicly visible, right? I can see you're fanboys of some other channels and I don't give two fucks what you or they think or do. Don't come here trying to promote your shitty videos or give peeps bad advice. For you turds with no content of your own, grab a camera and make some content and then your opinions might be worth a fuck.





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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