Generation III Internal Engine 1997-2006 LS1 | LS6
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2006 5.3

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Old 10-29-2018, 01:42 PM
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Default 2006 5.3

can you guys tell me what the plug called ECT is and where it plugs to? this wire is in a MSD wire harness and I am ready to start the motor for the first time.

Ok seems like that was a dumb question. sorry

I have a Fast EFI fuel sys and a MSD ign sys and both have a ect plug I also have a manual gage in the car. my problem now is that I can only find 2 places to have sending units, one in each head. any ideas where I can read the third ECT from?

my motor is 2006 5.3

Last edited by Manley Houghtalen; 10-29-2018 at 02:07 PM.
Old 10-29-2018, 01:54 PM
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Engine Coolant Temperature
Old 10-29-2018, 03:48 PM
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Front left on engine.
Old 11-03-2018, 07:20 PM
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I have a sender in both cyl heads one for the msd one for the fast efi and needed one for the gage in the dash I used a fiting in the upper rad hose.

I tried to start the motor today but no spark.
I am lost now.
Old 11-04-2018, 01:34 AM
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Could use more information. I assume this is a swap? What troubleshooting with the MSD have you done (if any)? Details will help us help you.




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