GM 3300 Intermittent no start rough idle (shorted injectors) part 2
66.8 هزار بار بازدید -
13 سال پیش
-
Part 1
Part 1 GM Bypass Ignition System Operation (...
This vehicle came in with good spark and no injector pulse. In part 1 of this case study I discuss with my class what this particular computer system needs to provide injector pulse.
Symptoms
- intermittent no start with good spark and no injector pulse
- hesitation
- misfire
Fix
- replace shorted fuel injectors
Tests shown
- how to test for a reference pulse
- how to verify the ECM is receiving an RPM signal
- how to speed up scan data parameters
- how to test for injector pulse
- how to enter a clear flood mode
- injector voltage waveforms
- injector current waveforms
Tools used
- scan tool
- lab scope
- low amp probe
- back-probing tools
- test leads
Playlist
- (Chapters 17, 18 and 19) Fuel Injector Testing
(Chapters 17, 18 and 19) Fuel Injecto...
Related Videos
- GM Bypass Ignition System Operation (part 1)
GM Bypass Ignition System Operation (...
- How to test for shorted fuel injectors (1987-1994 GM Cars)
How to test for shorted fuel injector...
- No Start No injector pulse (shorted injector) part 1
No Start No injector pulse (shorted i...
- No Start No injector pulse (shorted injector) part 2
No Start No injector pulse (shorted i...
- Rough idle, false MAP codes intermittent no start (shorted injectors) GM Rough idle, MAP code 33, intermitten...
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-sc... 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.
This vehicle came in with good spark and no injector pulse. In part 1 of this case study I discuss with my class what this particular computer system needs to provide injector pulse.
Symptoms
- intermittent no start with good spark and no injector pulse
- hesitation
- misfire
Fix
- replace shorted fuel injectors
Tests shown
- how to test for a reference pulse
- how to verify the ECM is receiving an RPM signal
- how to speed up scan data parameters
- how to test for injector pulse
- how to enter a clear flood mode
- injector voltage waveforms
- injector current waveforms
Tools used
- scan tool
- lab scope
- low amp probe
- back-probing tools
- test leads
Playlist
- (Chapters 17, 18 and 19) Fuel Injector Testing
(Chapters 17, 18 and 19) Fuel Injecto...
Related Videos
- GM Bypass Ignition System Operation (part 1)
GM Bypass Ignition System Operation (...
- How to test for shorted fuel injectors (1987-1994 GM Cars)
How to test for shorted fuel injector...
- No Start No injector pulse (shorted injector) part 1
No Start No injector pulse (shorted i...
- No Start No injector pulse (shorted injector) part 2
No Start No injector pulse (shorted i...
- Rough idle, false MAP codes intermittent no start (shorted injectors) GM Rough idle, MAP code 33, intermitten...
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-sc... 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.
13 سال پیش
در تاریخ 1390/08/27 منتشر شده
است.
66,827
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