Can the catalyst be removed ?

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uta_flyinghigh
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Can the catalyst be removed ?

Post by uta_flyinghigh » Mon Dec 03, 2007 11:06 am

As the title says, can a catback exhaust be installed on a 97 SOHC Neon ? And where is the pesky O2 sensor located ?

Thx

UTA
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6(sic)6
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Post by 6(sic)6 » Mon Dec 03, 2007 11:33 am

Yes, and there are two O2 sensors, on on the exhoust manifold and one (the downstreem) rite before the cat
SuperCharged SOHC http://forums.neons.org/viewtopic.php?t ... highlight=
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DOHCRT
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Post by DOHCRT » Mon Dec 03, 2007 9:48 pm

6(sic)6 wrote:Yes, and there are two O2 sensors, on on the exhoust manifold and one (the downstreem) rite after the cat
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6(sic)6
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Post by 6(sic)6 » Mon Dec 03, 2007 10:30 pm

Thanks, lol I havent had a downstream for about 5 years.......
SuperCharged SOHC http://forums.neons.org/viewtopic.php?t ... highlight=
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Whodini
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Post by Whodini » Wed Dec 05, 2007 8:01 am

unless you get an aftermarket pcm, or a mopar pcm, your cel will be nice and bright if you take off the cat.
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dlipford370
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Post by dlipford370 » Sun Dec 09, 2007 9:34 pm

There is also the option to put a resistor in the circuit, to eliminate the cel.
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Post by El_Diablo » Tue Dec 11, 2007 11:42 am

if only if it was that easy... on a fully OBD2 compliant car the O2 sensor is a constant variable, by tricking the computer with a non-variable resistor you could possibly throw a CEL and even worse is the fact that your engine will not know the proper fuel trim to use if its getting conflicting results from the O2 sensors

ive posted before on the malibu site i belong to about removing the cat though and i highly suggest you read this before removing it-
http://www.unitedmalibus.com/forums/sho ... php?t=1044
(sorry bout the weird post at the bottom, never noticed it had gotten edited, guess i'll go in and delete that sometime today :lol:)


bottom line, im far from a "tree hugger" but it just makes sense to run one, i got my high flow magnaflow cat for only $65 and that was with a pre-welded O2 bung... its really not that much added to the cost of the exhaust and its deffinetly worth it, just make sure you get an OBD2 compliant cat :wink:

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Post by NeonTuning » Tue Dec 11, 2007 11:56 am

allright thanks a lot! this link makes things very clear now.

The 95 Neon, is that OBD2 compliant?

and what cat converter do you recomend??

Thnx for all the info it really helps me!

Greetz Chris.
Love Redline Shifting......

El_Diablo
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Post by El_Diablo » Tue Dec 11, 2007 12:00 pm

any member feel free to correct me (new to neons) but i dont believe the 95 neon was fully compliant as it was not required until 96

i would recomend going with a magnaflow cat... inexpensive and they flow pretty well and like i posted above you can get them with pre-welded o2 bungs ;)

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Post by chipdogg » Tue Dec 11, 2007 2:16 pm

The downstream O2 sensor on a Neon has nothing to do with fuel trims, it's just used to check cat efficiency. With the O2 sensor unplugged, the PCM sees 4.5V, and the downstream is generally supposed to put out around .2V for the PCM to be happy, although technically it's supposed to oscillate as well just not as much/fast.
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Post by El_Diablo » Tue Dec 11, 2007 2:41 pm

k, cool, thanks for the info, wasn't sure on neons :)

wickedgoodneon
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Post by wickedgoodneon » Tue Dec 11, 2007 7:45 pm

From what ive heard removing a cat only gains about 1hp. so for the accessories needed to get rid of the cel it doesn't seem worth the time to me. And i wouldnt imagine that a highflow cat would yeild much more gains aswell. dunno maybe im misinformed

and the downstream o2 sensor is really easy to get to from underneath the car

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Post by NeonTuning » Wed Dec 12, 2007 5:33 am

I think I am going to check where I can get a cheap cat replacement with those O2 weldings.
Love Redline Shifting......

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Post by wickedgoodneon » Wed Dec 12, 2007 9:09 am


NeonTuning
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Post by NeonTuning » Wed Dec 12, 2007 9:30 am

aaaight thanks a lot, I think this is going to be the one, cuz you don't have to modify the rest of the exhaust system.
Love Redline Shifting......

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