my cat is dead so i swapped in a test pipe obd1 gsr

i got a cel how do i get rid of it or what can i do


i'll be running this thing till i find a new cat (hopefully soon) and this **** is ****ing loud... especially since im running a spec 2 holy hell and it smells horrendous

edit: i might have found a stock cat but it doesn't have any plated shields. do i need them do they do anything?


will the cel cause any problems in the mmean time? gas mileage affected or anything? i commute to work

 

Probably cause bad gas mileage but nothing horrendous. And no it shouldnt hurt anything. Some people have bad luck with 02 sensors but i've never really had a problem even with no 02 plugged in

 

yea my o2 is plugged into the test pipe right now

how much heat am i expecting to enter my cabin if i have no shields on the cat? i think i may be able to acquire a 96 gsr cat with shields ( supposedly those year cats rattle like ****) and a 96 cat w/ no shield.

i could possibly take the shields i have from the old cat but they're mangled

i can tell a cat is good if i can see light through it? or is there any better methods? want to make sure the cat is good and passes smog visually for peace of mind

 

If your 02 sensor is plugged in then there should be no CEL unless of a shitty sensor. Have you reset your ecu?

And im not sure how to tell if a cat is good or not. LOL Try looking to see if theres a **** load of carbon build up or what not?

 

didnt do anything but install the pipe and drive around

if the cel does nothing then i'll just hold off till i get a cat in lol

if anyone can chime in about the shields would be good, if all it does is prevent heat and if there isnt much heat increase then *** itsss those things get in the way when working around bolts anyways

 

Try resetting your ecu by taking off the + terminal on your battery for a few seconds. See if it kills your CEL

 

will be resetting tomorrow. unless i know that i can get the cat and in by tomorrow or within the week or so

 

obd1 shouldn't throw a code for the cat. Figure out what code you have to diagnose and fix it properly.

 

Do you see a huge cloud of black smoke and carbon all over your rear bumper? The car is going to run full rich with no O2. DUMB IDEA

 

^^ He is new to the site and already has the right idea.

 

well it threw a cel the moment the test pipe went on

i'm probably getting a cat on tomorrow and i'll reset the ecu so i'll see how it goes

 

is your car a 96+?
if so, your car is equipped with obd2, and the code will likely be for the secondary/downstream O2 sensor. this O2 only monitors the catalytic converter. it does not effect fuel trim.
i'm assuming this is the case, seeing as how the cel was illuminated after the test pipe was installed. only thing that makes sense. unless it's 95- and it's just a coincidence. or you damaged the O2 when removing.

 

Really? I've never had a problem. but like I said not everyone has the same luck

 

there's no "luck" involved, really. w/out the o2, the car runs in open loop mode. that is, the ecu doesn't receive feedback from the o2, and will run the vehicle on set fuel parameters.
during closed loop, the ecu adjusts fuel trim through feedback of the o2 and various other sensors

 

Of course im aware of that, all im saying is I never had any black residue like stated above.
Op can always get a chipped ecu and cross off the 02 sensor.

 

cross off a primary o2 sensor? please enlighten me on how that's done while remaining in closed loop. i'm serious. i'd like to know

 

what year is your car? if its 96 or newer its going to throw a CEL for the secondary with a test pipe, you'll need to try this until you get your new cat:

https://honda-tech.com/forums/acura-integra-type-r-8/spark-plug-non-fouler-1841240/

 

 

^^i see. that the s300 programmer?
but why would anyone want to disable the primary and run open loop?
probably to run a custom tune, eh?
thanks for sharing

 

No thats just Cheap old free Version of Crome that im sure alot of people started with.
Alot of people cross it off since they replace the narrow band 02 sensor with the wideband 02 sensor for tuning. With it crossed off it wont throw a CEL for the primary 02 sensor.

 

ahh, i see. admittedly, i'm not the highest guru when it comes to the aftermarket. i'm pretty much in my little non-obd or oem shell. but even the non-obd stuff is tunable these days. pretty cool ****

 

When I still had my cat with 02 sensor back then, all the wires were all screwed up from previous owner. With a CEL I didnt feel like purchasing a new 02 sensor since I knew I would be running a test pipe sooner or later. So I just crossed it off and CEL went away. Car ran fine, pulled the same. Once it is crossed off the ecu is no longer looking for it.

 

oh. but that's the primary? upstream of the cat? or are you talking about the secondary? because installing a test pipe shouldn't have any effect on the primary

 

A p28 only looks for the primary 02 sensor since obd1 cars do not come with the secondary 02 sensor. So the only 02 sensor an obd1 car would have is the one on the cat converter. Correct?

 

but it's before the cat. not on it