1990 civic hatchback failed emissions test, its putting out too much NO2
Thread Starter
Joined: Jul 2004
Posts: 21
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From: Atlanta, GA, USA
1990 civic hatchback failed emissions test, its putting out too much NO2 what could be causing this?
No EGR valve, any ideas what could be causing this?
Modified by almies at 5:47 PM 7/24/2004
Modified by almies at 5:47 PM 7/24/2004
Joined: Jul 2004
Posts: 78
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From: Palm Desert, ca, USA
Re: 1990 civic hatchback failed emissions test, its putting out too much NO2 what could be causing t
I have the same prob. i am thining of replacing the cat.
But you should check timing also, (should be good)
But you should check timing also, (should be good)
Honda-Tech Member
Joined: Jun 2004
Posts: 398
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From: stockton, ca
Re: 1990 civic hatchback failed emissions test, its putting out too much NO2 what could be causing t
i had the same problem...but i have an egr..first i changed the cat...didnt reallie help....then he said my manifold was clogged up...changed that n it finnaly passed...
Thread Starter
Joined: Jul 2004
Posts: 21
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From: Atlanta, GA, USA
Re: 1990 civic hatchback failed emissions test, its putting out too much NO2 what could be causing t
"i had the same problem...but i have an egr..first i changed the cat...didnt reallie help....then he said my manifold was clogged up...changed that n it finnaly passed..."
DId you do it yourself? How much did it cost you?
DId you do it yourself? How much did it cost you?
Honda-Tech Member
Joined: Jun 2004
Posts: 398
Likes: 0
From: stockton, ca
Re: 1990 civic hatchback failed emissions test, its putting out too much NO2 what could be causing t
my bro replaced it for me...he had an old hf laying around n took out the manifold..cleaned it....made sure air flowed threw all the ports (with an air compresser)....slaped it on..whoopow..it worked...
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