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non-fouler or Roe racing 02 sim

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non-fouler or Roe racing 02 sim
Old October 14th, 2012, 09:36 PM   #1
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non-fouler or Roe racing 02 sim

Just got an 01 Rt/10 that has an aftermarket exhaust(no idea what kind-All I know is it sounds fantastic) and apparently has no cats. Been throwing a code something to the effect of cat ineffiency.
Really don't want to change the exhaust or add any cats at this time. I have a stock 98 GTS I can drive for the more quiet times but am loving the sound and seat of the pants feel of added power that this RT/10 has.

A couple questions about the check engine light. The light comes on and then goes off for awhile before appearing again. When the light is on,does the computer change the airflow mixture at all? Just wondering if it screws up the richness because of no cats?
Which is the better route to take...non foulers or the Roe simms? Are both 100% effective at keeping the CEL at bay? And if the computer is indeed sensing no cats and playing with the mixture, does either one of these methods of keeping the CEL out fool the computer and keep the mixture at stock settings? or does it just keep the light out and the mixture is still being compensated for the no cats?
These may be dumb questions but I have no idea how all these sensors may or may not be tied into the computer fuel management programing.
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Old October 14th, 2012, 10:43 PM   #2
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I can't answer your question about which one is better, but your computer isn't messing with your a/f or timing numbers because of that code. From a performance standpoint, you are perfectly fine.

Last edited by 1.8t; October 14th, 2012 at 11:07 PM.
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Old October 14th, 2012, 11:00 PM   #3
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Some people also just remove the rear two sensors and zip tie them to the frame. Then just plug the 02 sensor holes.
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Old October 16th, 2012, 09:14 PM   #4
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I initially had the Roe sims and the first time I started the car one shorted out(?) and caught on fire. That's not to say it will happen to you hopefully, but if you do decide to get them watch out for that.
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Old November 11th, 2012, 08:26 PM   #5
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Ok..well I figured I'd try the non-foulers as a cheap route and so far so good with no CEL with over 300 miles. Normally the light would trigger within 100 miles after it went out.
Now I want to try and get this thing through inspection...our state only plugs into the obd and really doesn't check anything else anymore. I think I'm OK with the noise level but I have to get rid of any stored codes. Will removing the positive battery cable for awhile do the trick? Or should I find someone with a scanner remove the codes?
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Old November 11th, 2012, 09:00 PM   #6
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I'm running the foulers in my viper and mustang cheapest and easiest route


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Old November 12th, 2012, 04:11 PM   #7
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I'm running the foulers in my viper and mustang cheapest and easiest route


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...And also the most reliable.
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Old November 12th, 2012, 04:27 PM   #8
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non foulers
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Old November 12th, 2012, 04:33 PM   #9
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Thanks, the non foulers are working great so far. But I was also asking best way to clear stored codes. I ended up going today to the shop where I have some friends working and they cleared the cat ineffiency code with the scanner. However, it also clears other things which would draw a red flag for inspection.
They said as long as the light continues to stay off and I drive it for 100 miles or so...everything should reset and be ready for inspection.
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Old November 12th, 2012, 04:34 PM   #10
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Old November 13th, 2012, 08:39 AM   #11
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Since your obd2 has been reset, make sure to follow specific driving procedures to get all readiness monitors to set for the inspection (oxygen sensors, cats, etc....they all need a certain driving cycle). It should set the monitors over time, but if you need them quick, it's better to follow the specific cycles. I had a really tough time getting mine to set when I bought my Viper and had to get it inspected (I only had a week on my temporary permit). Some of the monitors just wouldn't set under normal driving conditions. Followed some internet steps (to the dot - which also meant driving really slow on the highway and everyone trying to figure out why a Viper was being passed by everything from Smart cars to bridlewood station wagons )
I suggest you get an OBD2 scan tool so that you can check your ecu before the inspection. It will tell you if there are any trouble codes, and what still has to be done. They're inexpensive and a great tool. I got one that plugs into my laptop, and it gives me everythng I need to know.
Good luck with the inspection, cheers
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Old November 13th, 2012, 02:56 PM   #12
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Get a SCT costs not much more and you can get it tuned. The SCT can turn it off.
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