I have a 91 305 with headders and I wanted to know if any one knows where I can find o2 eliminators or simulators I live in San Antonio tx

 

just curious why you would want to do that instead of getting a heated on and weld in bung or reducer with a bung in it you running HHO ?

 

What do you mean by bug o2

 

o2 sim is only for vehicles with oxygen sensors post catalyst, they provide feedback for catalyst efficiency and typically only read a steady .5 volts. Typically they are run on OBDII vehicles that remove the cats. On a TPI or any other fuel injection system, you need a primary o2 to monitor fuel adaptations, using an o2 sim in this position will not allow the vehicle to run properly.

 

Well right now I don't have my o2's or my cat and recently it started running more rich then usual what would be the easyest way to stop that without putting the cat back on

 

Put the O2 sensor back in.

 

Am I gonna need the cat

 

No. A high-flow cat certainly won't hurt you though.

 

no you dont need a cat but your oxygen sensor will not work properly if its just straight piped out and the sensor is close to the exhaust dump. I did mean Bung !

 

So just put back both o2 sensors or just the top o2

 

is this a LT1 or LS conversion ?

 

Na just a 305

 

Then you only have one o2 purple wire lead on the drivers side.

 

Yeah should I just put that o2 in?

 

yes, if your car still is running rich then switch to a heated o2s. The o2s should be able to reach 500-600 and be fully functional if you have a bung in the headers up high like the stock location was any lower you need to run a 3 or 4 wire heated sensor.

 

The headers a all smooth don't have any openings at the top part

 

go have a bung welded in or buy a reducer with a bung installed and run a 25312179 (AFS-74)

http://www.jegs.com/p/Hedman/Hedman-...esc1%7C0&Nty=0

 

Ok kool thank you for all the help.
So I need one up close by the driver side header

 

it would be best up higher but might not get hot enough so you may need to run a heated o2s so it will work correctly.

 

With the headers it won't get up to temp

 

might not unless you have a laser temp gun quit guessing.

 

Kool and those heated o2s do I have too special oder them or could I find them in a regular auto parts store

 

I have no idea what your auto parts inventory is. You can always contact jims performance .com for a sensor and pigtail.


http://www.jimsperformance.com/carty.html

 

Just pick up an o2 sensor for a '95 MPFI blazer. It's heated and uses the standard weatherpack connector. Easy.