Failed Emissions - ZR-1 Net Registry Forums

USAFPILOT · 06-02-2012

Car is 1994 Model stock except for SW Headers HF cats and B&B cat back. The chip is still the stock chip. It passed all tests except high speed Nox (ppm) which has a standard of 821 and the car registered 918. The low speed test it passed, standard was 907 and it registered an 859.

I have heard about some tricks to get under the limit such as gas additives etc. I am in need of recommendations. I have never had the car dyne tuned since changing the exhaust. Would that be worth a drive out to Corey Henderson's to have it tuned?

What is it going to take to get in under the 821. What are the chances the guy was in the wrong gear?

06-02-2012	#1
USAFPILOT Join Date: Aug 2007 Location: Spring TX Posts: 1,341	Failed Emissions Car is 1994 Model stock except for SW Headers HF cats and B&B cat back. The chip is still the stock chip. It passed all tests except high speed Nox (ppm) which has a standard of 821 and the car registered 918. The low speed test it passed, standard was 907 and it registered an 859. I have heard about some tricks to get under the limit such as gas additives etc. I am in need of recommendations. I have never had the car dyne tuned since changing the exhaust. Would that be worth a drive out to Corey Henderson's to have it tuned? What is it going to take to get in under the 821. What are the chances the guy was in the wrong gear?

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