Gas Direct Injection System With Intermittent Low Fuel Pressure
This is a 2014 Ford Fusion GDI with a low side fuel psi that is stuck at 109 psi on scan data with a desired fuel psi of 85. Symptoms are intermittent low power and stalling and will not restart until it cools down.
00:00 - customer complaint
04:09 - codes and data
07:00 - researching system operation
12:15 - fuel pump driver module testing part 1 https://youtu.be/Rwve6lXriO4 part 2 https://youtu.be/u342IRRJ5bk
12:50 - diagram of low and high side pressure sensors
14:00 - high psi solenoid unplugged test
16:25 - default strategy with low psi sensor unplugged
18:00 - direct fuel pressure measurement of the low side
20:30 - default low psi with low psi sensor unplugged
22:30 - command vs actual vs desired pressure
23:45 - psi sensor pinpoint testing (5v ref, signal, ground tests)
31:00 - heat gun on the low psi sensor
34:50 - review with my brother
37:21 - warning on "selling" the job
38:45 - days later with new sensor installed
40:38 - actual vs scan data (skewed sensor?)
47:30 - vapor lock condition
49:55 - me getting everyone sick
ScannerDanner Tools:
https://www.scannerdanner.com/tools.html
https://www.amazon.com/shop/scannerdanner
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.
Видео Gas Direct Injection System With Intermittent Low Fuel Pressure канала ScannerDanner
00:00 - customer complaint
04:09 - codes and data
07:00 - researching system operation
12:15 - fuel pump driver module testing part 1 https://youtu.be/Rwve6lXriO4 part 2 https://youtu.be/u342IRRJ5bk
12:50 - diagram of low and high side pressure sensors
14:00 - high psi solenoid unplugged test
16:25 - default strategy with low psi sensor unplugged
18:00 - direct fuel pressure measurement of the low side
20:30 - default low psi with low psi sensor unplugged
22:30 - command vs actual vs desired pressure
23:45 - psi sensor pinpoint testing (5v ref, signal, ground tests)
31:00 - heat gun on the low psi sensor
34:50 - review with my brother
37:21 - warning on "selling" the job
38:45 - days later with new sensor installed
40:38 - actual vs scan data (skewed sensor?)
47:30 - vapor lock condition
49:55 - me getting everyone sick
ScannerDanner Tools:
https://www.scannerdanner.com/tools.html
https://www.amazon.com/shop/scannerdanner
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.
Видео Gas Direct Injection System With Intermittent Low Fuel Pressure канала ScannerDanner
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