have a 96 351w van. has mass air. want true duel exaust x pipe with headers. van has 3 o2 sensors. keeping the 2 before cat but i`am going to remove the cat. what can i do to make everything work without cat or cats. what do i need to do to not get a check engine light. can i put the 3rd o2 sensor in the x pipe will it work correctly? i`am sure someone here knows what has to happen to make it work rite thanks for reading

 

Install the single downstream sensor somewhere downstream of the upstream one(s). The X pipe is as good a place as any.

You will need a MIL eliminator to fool the PCM into thinking you have a cat installed and working.

Steve

 

buy mil elminator do you mean an o2 sim? or are they 2 different parts? what brand should i look into , where can i get it , i have never seen one before. so now i`am in class thanks for reading

 

k did some searching i know what the eliminator is now. and i have also read lots of people that try to use them have nothing but problems (dont work) sure wish if someone had one laying around they`ed hook up an ohm meter to one to find out what resistor or cap is under the shrink wrap cant see spending $30 on a 10 cent resister that you can buy at radio shack. i also read somewhere that on mustangs you can turn the rear sensor off with a programmer and the it aslo makes it run a little better. can that be done with a 96 ford truck or van ecm also?? (96-97)

 

Google "make your own mil eliminator"

1 meg resistor, 1 uf cap, and some heatshrink. Less than a buck and some time. Simple RC integrator.

Programmers may have that capability. Check with the dealer/vendor.
Steve