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Re: EFI and Electronic Ignition Initial Start Up Questions [message #367920 is a reply to message #367887]

Thu, 09 December 2021 19:29

RF_Burns

Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada

Karma:

Senior Member

Tom,
I and several others have asked if the IGNition wire to the ECM has power during cranking. This is important to check because many circuits in the fuse panel have power with IGNtion ON, but not during cranking... these are actually Accessory power points.

You need to find a power source that comes ON during IGNITION AND CRANKING. Please confirm this, otherwise you will have no spark or fuel during cranking.

If I recall NONE of the Quick-Connect spades in the fuse panel has power during Cranking... you must tap off a fuse. According to the 1977 wiring diagram, only these fuses have power during cranking (IGNition 1)
-Directional Signals (DIR-SIG)
-Backup/Cruise
-Gauges/Trans(mission)

I believe mine (also a 1977) is connected to the Gauges/Trans fuse which is a short fuse at the bottom of fuse panel.

Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that

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[Message index]

		EFI and Electronic Ignition Initial Start Up Questions By: Tom Katzenberger on Wed, 08 December 2021 18:46
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Bill Van Vlack on Wed, 08 December 2021 20:28
		[GMCnet] Re: EFI and Electronic Ignition Initial Start Up Questions By: jimk on Wed, 08 December 2021 22:43
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Tom Katzenberger on Thu, 09 December 2021 06:48
		[GMCnet] Re: EFI and Electronic Ignition Initial Start Up Questions By: Keith V on Thu, 09 December 2021 10:07
		Re: EFI and Electronic Ignition Initial Start Up Questions By: RF_Burns on Thu, 09 December 2021 10:40
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Tom Katzenberger on Thu, 09 December 2021 10:42
		[GMCnet] Re: EFI and Electronic Ignition Initial Start Up Questions By: James Hupy on Thu, 09 December 2021 12:00
		Re: EFI and Electronic Ignition Initial Start Up Questions By: rvanwin on Thu, 09 December 2021 12:30
		Re: EFI and Electronic Ignition Initial Start Up Questions By: rvanwin on Thu, 09 December 2021 12:44
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Tom Katzenberger on Thu, 09 December 2021 13:32
		[GMCnet] Re: EFI and Electronic Ignition Initial Start Up Questions By: Dave Stragand on Thu, 09 December 2021 13:57
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Tom Katzenberger on Thu, 09 December 2021 15:37
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Bill Van Vlack on Thu, 09 December 2021 15:56
		[GMCnet] Re: EFI and Electronic Ignition Initial Start Up Questions By: James Hupy on Thu, 09 December 2021 15:59
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Tom Katzenberger on Thu, 09 December 2021 16:57
		[GMCnet] Re: EFI and Electronic Ignition Initial Start Up Questions By: James Hupy on Thu, 09 December 2021 17:08
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Tom Katzenberger on Thu, 09 December 2021 17:48
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Bill Van Vlack on Thu, 09 December 2021 18:30
		[GMCnet] Re: EFI and Electronic Ignition Initial Start Up Questions By: jimk on Thu, 09 December 2021 18:21
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Tom Katzenberger on Thu, 09 December 2021 19:02
		Re: EFI and Electronic Ignition Initial Start Up Questions By: RF_Burns on Thu, 09 December 2021 19:29
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Tom Katzenberger on Thu, 09 December 2021 19:40
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Bill Van Vlack on Thu, 09 December 2021 21:00
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Tom Katzenberger on Fri, 10 December 2021 08:20
		[GMCnet] Re: EFI and Electronic Ignition Initial Start Up Questions By: sgltrac on Fri, 10 December 2021 10:06
		[GMCnet] Re: EFI and Electronic Ignition Initial Start Up Questions By: jimk on Fri, 10 December 2021 10:08
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Tom Katzenberger on Fri, 10 December 2021 10:47
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Bill Van Vlack on Fri, 10 December 2021 11:45
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Biggamehunter on Fri, 10 December 2021 13:58
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Tom Katzenberger on Fri, 10 December 2021 14:16
		[GMCnet] Re: EFI and Electronic Ignition Initial Start Up Questions By: jimk on Fri, 10 December 2021 17:29
		[GMCnet] Re: EFI and Electronic Ignition Initial Start Up Questions By: sgltrac on Sat, 11 December 2021 01:20
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Biggamehunter on Fri, 10 December 2021 16:35
		Re: EFI and Electronic Ignition Initial Start Up Questions By: RF_Burns on Fri, 10 December 2021 18:38
		Re: EFI and Electronic Ignition Initial Start Up Questions By: RF_Burns on Sat, 11 December 2021 07:58
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Bill Van Vlack on Sat, 11 December 2021 11:00
		Re: EFI and Electronic Ignition Initial Start Up Questions By: RF_Burns on Sun, 12 December 2021 08:42
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Tom Katzenberger on Sat, 11 December 2021 13:45
		[GMCnet] Re: EFI and Electronic Ignition Initial Start Up Questions By: jimk on Sat, 11 December 2021 13:52
		[GMCnet] Re: EFI and Electronic Ignition Initial Start Up Questions By: jimk on Sat, 11 December 2021 13:52
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Tom Katzenberger on Sat, 11 December 2021 14:17
		Re: EFI and Electronic Ignition Initial Start Up Questions By: kingd on Sat, 11 December 2021 17:27
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Bill Van Vlack on Sat, 11 December 2021 18:43
		[GMCnet] Re: EFI and Electronic Ignition Initial Start Up Questions By: James Hupy on Sat, 11 December 2021 18:35
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Tom Katzenberger on Sat, 11 December 2021 19:51
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Tom Katzenberger on Sat, 11 December 2021 19:54
		[GMCnet] Re: EFI and Electronic Ignition Initial Start Up Questions By: James Hupy on Sat, 11 December 2021 19:58
		Re: EFI and Electronic Ignition Initial Start Up Questions By: RF_Burns on Sat, 11 December 2021 22:13
		Re: EFI and Electronic Ignition Initial Start Up Questions By: RF_Burns on Sun, 12 December 2021 08:31
		Re: EFI and Electronic Ignition Initial Start Up Questions By: Tom Katzenberger on Sun, 12 December 2021 12:27
		Re: EFI and Electronic Ignition Initial Start Up Questions By: jhbridges on Sun, 12 December 2021 17:28

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