cat problem on 99 civic ex
05-04-2009, 10:05 PM
#1
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cat problem on 99 civic ex
Got a check engine light on the car i bought a few days ago.
getting code
P0420
Catalyst System Efficiency Below Threshold (Bank 1)
the person that i bought it from told me that something was up with the cat. not too experienced with catalyst system.
can some 1 enlighten me what does the code mean?
99 civic ex
STOCK other than 2.5' piping
getting code
P0420
Catalyst System Efficiency Below Threshold (Bank 1)
the person that i bought it from told me that something was up with the cat. not too experienced with catalyst system.
can some 1 enlighten me what does the code mean?
99 civic ex
STOCK other than 2.5' piping
05-04-2009, 10:23 PM
#2
H-T White Ops
Re: cat problem on 99 civic ex
The oxygen sensors monitor the catalytic converter's ability to store oxygen.
- Catalytic converter defective (Failure possible due to following).
- Engine misfire or running condition.
- Large vacuum leak.
- Engine oil leakage into exhaust-valve guide seals, piston rings.
- Catalytic converter defective (Failure possible due to following).
- Engine misfire or running condition.
- Large vacuum leak.
- Engine oil leakage into exhaust-valve guide seals, piston rings.
05-04-2009, 10:34 PM
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Re: cat problem on 99 civic ex
when i hit the power band at about 4,500 rpm, the sounds changes.
leads me to believe that MAYBE the cat was hollowed out.
but i am not sure.
how can i detect a vacuum leak?
my idle is not high so i rejected that first. but now im starting to wonder
leads me to believe that MAYBE the cat was hollowed out.
but i am not sure.
how can i detect a vacuum leak?
my idle is not high so i rejected that first. but now im starting to wonder
05-05-2009, 10:49 PM
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Re: cat problem on 99 civic ex
where would the exhaust leak be?
pre or post cat?
after a few hours of studying and reading up in this, one of the most common solutions is to replace the cat.
any one know where i can get a high flow cat that CAN be shipped out to cali?
and is legal?
pre or post cat?
after a few hours of studying and reading up in this, one of the most common solutions is to replace the cat.
any one know where i can get a high flow cat that CAN be shipped out to cali?
and is legal?
05-05-2009, 11:44 PM
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Re: cat problem on 99 civic ex
I would just buy Magnaflow high flow cat. I believe they are 50 state legal, but check before you buy. I got mine for $100 and free shipping. Very happy with it.
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05-06-2009, 04:13 PM
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Re: cat problem on 99 civic ex
If you have an exhaust leak, its PRE cat. Butsounds like the cat was gutted. Some signs is if you have black gritty stuff on your bumper or around your exhaust.
I would just buy Magnaflow high flow cat. I believe they are 50 state legal, but check before you buy. I got mine for $100 and free shipping. Very happy with it.
I would just buy Magnaflow high flow cat. I believe they are 50 state legal, but check before you buy. I got mine for $100 and free shipping. Very happy with it.
05-07-2009, 10:42 PM
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Re: cat problem on 99 civic ex
Yea. I see, its 49 state(not CA) legal. You may just have to purchase DEC brand. They aren't high flow, but are oem replacement, thus carb legal
05-07-2009, 10:53 PM
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Re: cat problem on 99 civic ex
quick question i have a ls swap and it came without a cat would getting the integra cat allow me to pass nj emissions? Seeing how the one for my stock y7 will not work?
05-08-2009, 12:36 AM
#11
Re: cat problem on 99 civic ex
Yes. As long as it isn't too long to fit (i'm not sure if it is or not). I can't remember if you need an Integra cat or a 96-00 EX Civic cat.
05-08-2009, 02:50 AM
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Re: cat problem on 99 civic ex
well i plan on installing my ws2 at the same time so length wont matter much can always make it work and thank you i do believe i would need the integra one because my cat is supposed to be located after the header.
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