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Anyone Have Experience with O2 Sims? (off-road only of course)

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Anyone Have Experience with O2 Sims? (off-road only of course)
Old December 5th, 2012, 03:57 PM   #1
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Anyone Have Experience with O2 Sims? (off-road only of course)

I did a side-exhaust conversion on my '02 GTS a while back and the O2 sensors wouldn't reach the new exhaust. I recently purchased some O2 simulators until I can replace the old sensor cables with new longer ones. The sims plug right in but they came with no directions. The place I got them from (don't want to get anyone in trouble) said that they were plug and go. There is a red light that is on the sims and it's blinking. With all the people on here and the experience that I've seen, I figured someone would have done this and knows if blinking is normal and whether or not the "check engine" light would have to be reset or if it would do it on it's own?
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Old December 5th, 2012, 05:05 PM   #2
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not sure about the blinking but if there is a code, it will need to be cleared
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Old December 6th, 2012, 12:17 PM   #3
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Thanks for the info. I just found out that they are the Roe Racing simms listed on their site, but it doesn't say anything other than that they are simulators. So far, I think they are a wasted because I can't tell any difference except my wallet is $175 lighter.
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Old December 6th, 2012, 12:20 PM   #4
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You won't tell any difference other than the Check Engine Light not coming on after removing the cats. Could have saved the money and went with foulers or just plugging the bung and zip tieing the sensors to the frame.
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Old December 6th, 2012, 01:28 PM   #5
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went with foulers
Do those actually work well for Vipers? I've read on other car forums that they're great, others said they didn't work for them. Would be an easy solution
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Old December 6th, 2012, 01:34 PM   #6
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You won't tell any difference other than the Check Engine Light not coming on after removing the cats. Could have saved the money and went with foulers or just plugging the bung and zip tieing the sensors to the frame.
I plugged them and wired them to the frame but ever since car idles a little rough and higher than normal. Above 2,000 rpm's no difference when I disconnected sensors, but below is a different story. Before I spent the money I did a little bit of research and found that these were the symptoms of just tying them off (plus much worse fuel economy) and I was told by another source that these would fix all that.
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Old December 6th, 2012, 01:36 PM   #7
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went with foulers
Do those actually work well for Vipers? I've read on other car forums that they're great, others said they didn't work for them. Would be an easy solution
I've heard the same, applies for both foulers and sims and have read that on some vehicles each will do great and on some they won't. I'm not even trying to jack with the emissions, the sensors just won't reach. Would've been happier with some kind of extensions but couldn't find any.
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Old December 6th, 2012, 01:56 PM   #8
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You can extend the CHASSIS SIDE wiring harness. I think that's in my side exhaust DIY thread, how I did that to my car, which runs the rear sensors like factory.
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Old December 6th, 2012, 02:12 PM   #9
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You can extend the CHASSIS SIDE wiring harness. I think that's in my side exhaust DIY thread, how I did that to my car, which runs the rear sensors like factory.
I'll check it out, I'm kicking myself for spending the money on those sims. Vendor won't allow returns.
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Old December 6th, 2012, 03:21 PM   #10
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foulers work fine but it might depend on the year
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Old December 6th, 2012, 04:08 PM   #11
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You are talking about the rear sensors correct? It's my understanding they have no input to PCM for idle/fuel control only for cat efficiency. I think you have other issues causing your high idle problem.
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Old December 6th, 2012, 04:10 PM   #12
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I suggest disconnecting the battery and resetting the PCM.
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Old December 6th, 2012, 04:24 PM   #13
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I suggest disconnecting the battery and resetting the PCM.
I'll give that a shot, thanks for the idea.
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Old December 6th, 2012, 04:36 PM   #14
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Agreed rear O2s only send signal if the cat has failed.


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Old December 6th, 2012, 05:04 PM   #15
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So if I delete my cats I'll get codes. Sweet lol.
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