True dual exhaust and O2 Sensors

[marchil at ibm.net]

>I'm exploring the possibility of changing from single to true dual exhaust on
>my late model Ford truck which appears to have the EEC-IV and MAF sensor
>(California). Do I need to install a second O2 sensor? Would this sensor be
>connected parallel to the original or does the EEC-IV have an input for a
>second sensor? I think many (most?) late model mustangs had true dual exhaust
>and the controllers are similar I would guess.

>Nick Hagen 

Hi Nick

I would find a late model EEC-IV from a 5.0L Mustang.

Your present HEGO will be used as the right one.
You will have to run a wire from pin 43 from the 60 pin connector to what will be the 
left HEGO, connect in parallel the other two wires from the right HEGO, one wire is the 
ground and the other is 12V.
Now you have to find a friend or maybe talk to Peter Wales "President of Superchips" and 
burn a new EPROM with all the information of the mustang EEC-IV except the fuel tables 
that will come from your pickups EEC-IV or an optimized fuel table would be preferred.

Good Luck.

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