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 Post subject: 4.3 vortec wiring help
PostPosted: Tue Jul 03, 2012 2:02 pm 
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Joined: Thu May 17, 2012 2:22 am
Posts: 16
I have started to modify the 4.3 engine harness and removing what I Dont need.
It's one he'll of a mess right now because I'm unsure on what the motor needs to run.
I know I have ALOT more to remove but dose some one have a wiring diagram for the Howell efi vortec harness I plan on getting there ecu but I'm not spending 500 for a harness.
Or if anyone who has done this can chime in that would be great
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PostPosted: Tue Jul 03, 2012 3:22 pm 
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Joined: Sat Apr 21, 2012 12:23 pm
Posts: 22
Location: Artesia, NM
Once you really start working on the harness, you'll see why $500 isn't so bad. You have to make sure every wire is routed, connected and spliced correctly. With patience enough determination and the proper wiring diagrams, I have no doubt you can do it.

Think of the $500 investment as payment to expedite your project and allow you to drive and enjoy it sooner. With that said, I may be of some help. I have access to a friend's alldatapro account. What vehicle did the donor engine come out of? I think I can email the diagrams you need. PM me your email address.


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PostPosted: Wed Jul 04, 2012 10:41 pm 
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Joined: Thu May 17, 2012 2:22 am
Posts: 16
I need to know what sensors are left in the Howell vortec harness
I have most of it done just unsure about a few of the sensors


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PostPosted: Fri Jul 06, 2012 12:31 am 
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Joined: Thu May 17, 2012 2:22 am
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This is what I have now still looking for a list of sensors used in Howell harness or what's absolutely needed for the motor to run I dont need emissions I Live in wi there's no testing.
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Ignore duck tape holding casing together ran out of wrap


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PostPosted: Mon Jul 23, 2012 2:15 pm 
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da LUV masta

Joined: Sat Apr 12, 2003 11:50 pm
Posts: 582
Location: San Leon Tx.
If you bought a Howell Harness, just call them and they will tell you how to connect everything.

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PostPosted: Sat Sep 22, 2012 9:40 pm 
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lives at LUVTruck.com

Joined: Wed Aug 26, 2009 6:25 pm
Posts: 363
Location: macon,ga
or ditch the efi and put a carb on it..

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