The O2 Simulator that afterthoughts auto offers. Has anyone used these and are they any good? I'd like to see what you all think.

 

i just installed them yesterday no check engine light

 

thanks i'm about to install cam intake ect. So it should work the same afterwards right

 

as far as i've experienced it shouldn't throw a light but as far as emissions testing goes that i'm not sure about. i'm going to get my car tuned and delete the rear o2's and the air pump anyway

 

Who make them? Are they all the same?

It's been a few years but when I first installed my headers I used O2 sims purchased through LS1 speed. One of them was a dud from the beginning (speed replaced it), and less than a year later the other went bad.

 

O2 simulators are unreliable. I'd hold off on the sims and when you get tuned, have the rear o2's set to "no report".

 

I sold mine and just shut them off with EFI Live. Those ones that they have at ATA probably are just stocked and that is it. EPA is in charge now boys. They are going to end the production of those simulators. Caspers has already stopped making them, and I think that they made up the 90% majority of the business.