1992 Cadillac Fleetwood - Misfire, Rough Idle, Poor MPG (Shorted Injectors)

This is typical of early GM fuel injectors (multec-1). On the 2.8L, 3.1L and 3.3L group fired systems, one shorted injector will cause a no start! On the sequential engines, like on this Cadillac, misfiring and rough idle is the typical complaint. Be aware of replacement parts and the characteristic differences you will see in a current ramp waveform. For you scope guys out there, this type of thing can have you barking up the wrong tree. Related videos: Rough idle, MAP code 33, intermittent no start (shorted injectors) - GM /watch/YdkwmL2-OIi-w How to test for shorted fuel injectors (1987-1994 GM Cars) /watch/oI6tA5Ruxssut How to interpret fuel injector waveforms (a ScannerDanner Premium video) /watch/4k5gpL0tum4tg GM 3300 Intermittent no start rough idle (shorted injectors) part 2 /watch/YDQ7xjNtumvt7 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.

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