Gutting the pre cats
blu3kgt
10-09-2007, 01:16 PM
well i just wanted to make sure but if i gut my pre cats.. more that likely i will get a (CEL) ????if i do get a CEL will the o2 simulators be able to solve this problem
jason_bet
10-09-2007, 01:32 PM
They should..
Stealthee
10-09-2007, 08:02 PM
You have a 97, yes it will throw a CEL. Get o2 sims from 3sx.
Hotshot8792
10-09-2007, 10:01 PM
have fun gutting :)
blu3kgt
10-10-2007, 08:44 AM
lol yea i heard it sucks but o well... well thanx i will go ahead and order the o2 simulators..... also another question do you think it will have at least a considerable hp gain or pull harder to redline?? basically i am asking is are the results from gutting the precats worth the trouble??
Stealthee
10-10-2007, 07:00 PM
Even only being SOHC I liked the difference. May not be much power, but every little bit helps.
mistermoonpie
10-12-2007, 10:44 AM
SORRY, noob still learning the basics
What is a CEL?
What are o2 Simulators/what do they do?
I have a 97 SL and this sounds like a fairly simple (though time consuming) project...Will it mess with emissions and make my car illegal? Im not really lookin to do that.
What is a CEL?
What are o2 Simulators/what do they do?
I have a 97 SL and this sounds like a fairly simple (though time consuming) project...Will it mess with emissions and make my car illegal? Im not really lookin to do that.
vectorspecialist
10-12-2007, 10:59 AM
CEL: Check Engine Light
as for passing or failing emissions it just depends on the state you're in, each one is different...some dont even have inspection
as for o2 simulators...i dont know...can garuntee stealthee does
as for passing or failing emissions it just depends on the state you're in, each one is different...some dont even have inspection
as for o2 simulators...i dont know...can garuntee stealthee does
blu3kgt
10-12-2007, 12:21 PM
the o2 simulators hook up to the o2 sensors... the o2 sensors get a certain resistance that they have to stay in, in order for your check engine light not to come on, so if you gut the pre cats, the o2 sensors will have a different reading and it will set the check engine light on. so you hook up the o2 simulators and they will simulate the resistance, making the ecu think that everything is ok, so your check engine light won't come on even though you have your precats gutted... so far to my knowledge i think that is what they do but stealthee would be a better source
Stealthee
10-12-2007, 01:09 PM
It wont mess with emissions.
As stated it makes the ECU believe the pre cat's properly functioning by sending the correct signals to the ECU.
As stated it makes the ECU believe the pre cat's properly functioning by sending the correct signals to the ECU.
new2mitsu
10-12-2007, 04:58 PM
from what i've seen the precats only function befor the car and exhaust is at running temp, after that all you need is the main cat
mistermoonpie
10-12-2007, 05:00 PM
Well then with o2 simulators telling my car that everything is ok with my engine, Will my CEL come on if there actually is a problem that I need to know about?
blu3kgt
10-12-2007, 05:27 PM
yea the cel will come on if anything else goes wrong....
Stealthee
10-12-2007, 06:09 PM
Well then with o2 simulators telling my car that everything is ok with my engine, Will my CEL come on if there actually is a problem that I need to know about?
Yes the sims only affect the pre cat o2's
Yes the sims only affect the pre cat o2's
Automotive Network, Inc., Copyright ©2026