Secondary Air Bypass? - Defender Source
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  #1  
Old November 18th, 2009, 01:45 PM
Gibson04
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Justin Church
1994 D90 / '04 Disco
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Secondary Air Bypass?

I am in the process of rebuilding the 4.6 in my 2004 Disco. I am doing some performance mods while I have it torn down (nothing wild) and I am very interested in bypassing the secondary air system in a way that will not cause fault codes.

Has anyone figured this out yet? The hardware would be easy....ie. plug the secondary air passages on the heads but I am unsure how to keep the computer happy afterwards.

Justin
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  #2  
Old November 18th, 2009, 03:36 PM
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evilfij
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evilfij
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I believe you can through testbook tell it that it does not have secondary air.
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  #3  
Old November 18th, 2009, 08:04 PM
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Stmpede
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Andrew Najarian
'93 NAS D110 #43
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What he said.
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  #4  
Old November 18th, 2009, 10:14 PM
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evilfij
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Quote:
Originally Posted by Stmpede
What he said.
I get that a lot.
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  #5  
Old November 19th, 2009, 06:14 AM
Gibson04
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Justin Church
1994 D90 / '04 Disco
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should have the block back in the truck by 12/15 ..........will report my findings.
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