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Originally Posted by superbluecivicsi
No vehicle will past a sniffer with a straight pipe on. that is a fact.
federal EPA standards are set for a light duty vehicle with 100,000 miles or 10 yrs old at .31 for NMHC, 4.2 for CO, 0.6 for NOx, .10 for PM. A new vehicle coming off the assembly line today will not meet this EPA standard without a cat. keep in mind, individual states have the same or higher standards. The day I legitimately pass a obd vehicle running a straight pipe will be the day mankind finds a new fuel to replace gasoline. That day is not even close yet.
Anyone can pass with a straight pipe if the price is right  |
i realize you guys are mostly talking about newer generation hondas but the stock motor in my 83 civic (1.5l CVCC) passed emissions twice with 2.25" straight pipe and no cat. now the 1.8l with the Webers...we'll have to see on that one.
my suggestion, change the PCV valve (cheep) and check your O2 sensor, if it’s bad it’s not so cheep but still not killer on the wallet