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im trying to set the timing on my 92 4.3L (z) TBI. in my manual it says to disconnect a brown wire near the AC. to get the correct timing. i guess it disconnects the computer or something so there is no interference with the base setting. but i cant find the
wire.

if anyone has ever done this , where is the wire located exactly?
 

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im pretty sure its under the passenger side carpet by the firewall...in the computer harness..just pull back the carpet and youll see it... i thinks its brown/white or brown/black
 

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Yep the above is right. It's right where he said it is. It's tan/black
wire with a tiny black connector..Just pull back the carpet and
look at about half-way up the firewall in the pass area.
 
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