Car Fix DIY Videos

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
https://youtu.be/iIO-2LmwkdY
How to test for shorted fuel injectors (1987-1994 GM Cars)
https://youtu.be/ssxuR5At6Io
How to interpret fuel injector waveforms (a ScannerDanner Premium video)
https://youtu.be/4mut0Lpg5k4
GM 3300 Intermittent no start rough idle (shorted injectors) part 2
https://youtu.be/vmutNjx7QDY

ScannerDanner Tools:
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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.
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