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Will my computer throw a code w/ no cat?

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Old Apr 15, 2003 | 08:42 PM
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Boosted GSR's Avatar
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Default Will my computer throw a code w/ no cat?

i have a 95 gsr, obd1 and i wanted to put a straght pipe on their. would the comp. throw a check engine light?
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Old Apr 15, 2003 | 08:50 PM
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Default Re: Will my computer throw a code w/ no cat? (Boosted GSR)

Nope. You're good.
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Old Apr 15, 2003 | 08:51 PM
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Default Re: Will my computer throw a code w/ no cat? (Boosted GSR)

nope
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Old Apr 15, 2003 | 08:53 PM
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Default Re: Will my computer throw a code w/ no cat? (riceball777)

what do i do with that sensor then that plugs into the cat?
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Old Apr 16, 2003 | 12:46 AM
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:jdmshmaydm:'s Avatar
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Default Re: Will my computer throw a code w/ no cat? (Boosted GSR)

If there's a sensor that plugs into the cat then you will throw a code. I understood that OBD1 cars didn't have the O2 sensor on the cat. The code thrown will be, "67 - Low Catalytic Converter Efficiency."
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Old Apr 16, 2003 | 05:25 AM
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Default Re: Will my computer throw a code w/ no cat? (Gatecrasher19AF)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Gatecrasher19AF &raquo;</TD></TR><TR><TD CLASS="quote">If there's a sensor that plugs into the cat then you will throw a code. I understood that OBD1 cars didn't have the O2 sensor on the cat. The code thrown will be, "67 - Low Catalytic Converter Efficiency."</TD></TR></TABLE>

true, btw nice sig, what r u 12??
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Old Apr 16, 2003 | 06:08 AM
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Default Re: Will my computer throw a code w/ no cat? (Gatecrasher19AF)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Gatecrasher19AF &raquo;</TD></TR><TR><TD CLASS="quote">If there's a sensor that plugs into the cat then you will throw a code. I understood that OBD1 cars didn't have the O2 sensor on the cat. The code thrown will be, "67 - Low Catalytic Converter Efficiency."</TD></TR></TABLE>

No, the '95 is OBD-1...
I've got a '95 GS-R and the single O2 sensor is in the catalytic converter, but its UPSTREAM of the catalyst core. So its just like having it in the A-pipe. You need to get a sensor fitting welded into your test pipe, basically putting the sensor where it would have been...

The OBD-II cars had the 2nd sensor in the middle or the end of the catalyst, so it could measure the exhaust after it had already passed thru most of the catalyst.
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Old Apr 16, 2003 | 07:13 AM
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Default Re: Will my computer throw a code w/ no cat? (JimBlake)

just get a cheap obx one from ebay that had the bung in it already for the o2 sensor...approx $50
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Old Apr 16, 2003 | 07:23 AM
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Default Re: Will my computer throw a code w/ no cat? (JimBlake)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JimBlake &raquo;</TD></TR><TR><TD CLASS="quote">

No, the '95 is OBD-1...
I've got a '95 GS-R and the single O2 sensor is in the catalytic converter, but its UPSTREAM of the catalyst core. So its just like having it in the A-pipe. You need to get a sensor fitting welded into your test pipe, basically putting the sensor where it would have been...

The OBD-II cars had the 2nd sensor in the middle or the end of the catalyst, so it could measure the exhaust after it had already passed thru most of the catalyst.
</TD></TR></TABLE>

Well put.

When I was going to get my carsound cat put in, the guy bitched a fit b/c the car sound cat didn't have a bung for it.

SO OBD1 cars DO have 1 sesnor at the front

OBD2 GSR's have 1 senor at the front and 1 senor in the middle or in the back.
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