Jeep Cherokee 4.0L Misfire and Primary Ignition Trouble Codes

2001 Jeep Grand Cherokee 4.0L intermittent misfiring with codes P0351, P0352, P0353, P0301, P0302, P0303, P0304, P0305, P0306. Troubleshooting and repair. Tests shown - scope sample rate and when you must increase it - ignition coil current ramp test - how to test a crank sensor - how to test a cam sensor - why knowing circuit design is critical - 5v pull-down hall effect sensor testing - how to adjust the crank sensor air gap - when to set a scope trace for detail and repetition - what is scope aliasing Tools (alternatives to the Snap-on Verus shown in the video) - PicoScope 4425 4 Channel Standard Diagnostic Kit https://www.aeswave.com/cart.php?m=affiliate_go&affiliateID=60df1b5cf6e5582af6ff81c728f42d0d&go=https://www.aeswave.com/PicoScope-4425-4-Channel-Standard-Diagnostic-Kit-p9276.html - Autel MaxiSYS MS908 Diagnostic System with Wireless VCI https://www.aeswave.com/cart.php?m=affiliate_go&affiliateID=60df1b5cf6e5582af6ff81c728f42d0d&go=https://www.aeswave.com/Autel-MaxiSYS-MS908-Diagnostic-System-with-Wireless-VCI-p9202.html Related Videos - Misfire caused by a misadjusted crank sensor (rubbing on flywheel) https://youtu.be/ws59zXvr1SM - Picoscope Basics Part 1 https://youtu.be/81AGbZcgCZs - Picoscope Basics Part 2 https://youtu.be/ntJJYhkmR4I - Snap-on Vantage Pro Training (Part 7) https://youtu.be/UAGsDfOOo1Y - Snap-on Verus Training (Part 13) https://youtu.be/sXntfHzTru4 - 1996 Jeep 4.0 timing problems (4 part series on SD Premium) https://www.youtube.com/playlist?list=PLM4TD8VJ3gj9Q2lFyQtCYfB8XOlvHhGsf - Intermittent stall, no start - P0320, P1391 cam, crank sensor testing (Jeep) https://youtu.be/qpL_0-8DrhE 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 https://www.scannerdanner.com/join-scannerdanner-premium.html 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! Disclaimer: Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.