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Re: EFI and Electronic Ignition Initial Start Up Questions [message #367964 is a reply to message #367887]

Sat, 11 December 2021 22:13

RF_Burns

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

Karma:

Senior Member

Tom,

I still don't know if you have a 4-wire spark controlled by ECM (ESC) distributor, or a standard vacuum advance distributor??

This matters because if the ECM doesn't see pulses from the distributor, it will not open the injectors. The ESC distributor operates by itself at very low (cranking) RPMs. The EBL ECM takes over spark control above 400RPM.

The 30PSI reading is concerning because the fuel pressure regulator is right after the injectors. It is a bypass type regulator that dump excess fuel to the return line to regulate the fuel pressure at 12-13PSI. This farmboy mechanic thinks the fuel pressure should be close to the same at the inlet side of the throttle body... at least it is on mine. 30PSI could lock the injectors closed and the electrical coils not have enough power to pull them open at that pressure.

It would help if you loaded the Whats up display (WUD) on your computer for troubleshooting this problem. From it we could tell if you are running the proper BIN program for the 455 and if the BIN is even selected (there are 8 available).

Another issue could be the Throttle Position Sensor (TPS) if the ECM is reading the TPS at more than 80% wide open throttle while cranking, it will think you are trying to clear a flooded condition and cut fuel injection. This could be caused by a misaligned TPS sensor, a faulty TPS, or miss-wiring of the TPS. The WUD would tell us this.

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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