Do O2 Simulators Make a Truck Run Richer If you remove your cats ?

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May 16, 2002 | 02:02 PM

LeesSilverado

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From: Dingess, WV 25671

Do O2 Simulators Make a Truck Run Richer If you remove your cats ?

Hi gang!!!

I have a 2002 Silverado with a 5.3 and I have removed the cats and use O2 Simms for the O2 Sensors behind the cats.

Does using O2 Simms make your truck run Richer than it would if you still have your cats on and using regular O2 Sensors???
<img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />

May 16, 2002 | 02:10 PM

really slow truck

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From: north dallas

Re: Do O2 Simulators Make a Truck Run Richer If you remove your cats ?

nope the rear o2s have no effect on fuel supply to the engine. I'm guessing taking off your cats would make you run richer just like adding headers do

May 16, 2002 | 11:37 PM

red53gmc

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From: Baton Rouge, LA

Re: Do O2 Simulators Make a Truck Run Richer If you remove your cats ?

I'm pretty sure the front O2's tell the pcm whether you're rich or not. The rear O2's are for emissions only.

May 16, 2002 | 11:39 PM

Jason99T/A

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From: Baton Rouge, LA

Re: Do O2 Simulators Make a Truck Run Richer If you remove your cats ?

<blockquote>quote:<hr />Originally posted by white53gmc:
I'm pretty sure the front O2's tell the pcm whether you're rich or not. The rear O2's are for emissions only.<hr /></blockquote>Correct!!