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-   -   2006+ no secondary air injection system (https://www.s2ki.com/forums/s2000-under-hood-22/2006-no-secondary-air-injection-system-1193373/)

jyeung528 04-16-2019 01:26 PM

2006+ no secondary air injection system
Out of curiosity, the 2006+ s2000's no longer have the secondary air injection system.

What do they replace it with?

It doesn't look like it's replaced with anything, so how are they achieving reduced emissions at cold start up? Isn't the secondary air injection required by emissions laws?

stewpitt 04-16-2019 02:15 PM

IIRC 2002+ ap1's dont have the air pump either? Ive heard the 2000 and 2001 ap1 ecus run rich. Maybe the air pump was there to compensate for early model tunes from the factory?

noodels 04-16-2019 02:33 PM

dbw TB and ecu modifications to meet requirement standards.

Billman250 04-16-2019 03:07 PM

Air pump present 00-05.

jyeung528 04-16-2019 03:09 PM

Originally Posted by noodels (Post 24590738)
dbw TB and ecu modifications to meet requirement standards.

Based on secondary air injection systems helping to burn excess unburnt fuel at cold start, would you be able to elaborate how dbw or ecu modification would help burn unburnt fuel in cold start situation? Do these modifications relegate secondary air injection as obsolete? My dbw Audi still has secondary air injection, couldn't they also modify the ECU and get rid of secondary air system just like Honda did?

noodels 04-16-2019 03:13 PM

Have on my 04-05.

noodels 04-16-2019 03:16 PM

its in the fuel tables from factory ecu,thus built in for regs

noodels 04-16-2019 03:17 PM

pps its only there to heat up the cat

jyeung528 04-16-2019 03:26 PM

Right, heat up the cat for a couple of minutes at cold start.

So how is an ecu modification heating up the cat at cold start without the secondary air injection? I'm curious about the actual method that allows them to completely remove secondary air.

noodels 04-16-2019 03:34 PM

A module or a resisitor in place.

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