Failed Emissions for a 93 JDM Prelude
Thread Starter
Joined: Nov 2004
Posts: 33
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From: Oxford, CT, USA
Failed Emissions for a 93 JDM Prelude
I just failed my emissions, i have NO idea what i am gonna do. Here are my readings:
HC: Pass = 130 Mine = 144
CO: Pass is .70% Mine = 2.40% LOL
NOx: Pass 1522 Mine 838
So i passed the last one.... what the hell ! lol
HC: Pass = 130 Mine = 144
CO: Pass is .70% Mine = 2.40% LOL
NOx: Pass 1522 Mine 838
So i passed the last one.... what the hell ! lol
Joined: Jul 2004
Posts: 154
Likes: 0
From: Satellite Beach, FL, USA
Re: Failed Emissions for a 93 JDM Prelude (Tronix102)
I would think if you advanced the timing a little bit, it would burn the mixture more completely, but I'm not sure...May need some more input on that... 
Junior Member
Joined: Oct 2004
Posts: 120
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From: Centreville, Va, USA
Re: Failed Emissions for a 93 JDM Prelude (Tronix102)
You do not need a new cat. What you need is an oil change, possible a tune up if not done within thw last 50K and/or advance timing
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