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I live in California, and we have some of the strictest emissions laws over here. Now I was reading upon this and it caught my attention :

http://www.smogtips.com/functional_inspection.cfm (look at OBD1 CEL section)

It states that a smog technician checks to see if the CEL comes on during standby, and not while the engine's running. I wanted to know if it's possible to bypass this somehow and rig something (I remember seeing a question like this a few months ago, but can't find it) so that the CEL DOES come on when it's on standby and turns off when it's not (like a regular ecu.)

I'm not worried about the visual or sniffer part of the smog test (my engine's internally fine)because if this actually works out..I may have found a giant loophole for OBD1 Miata owners. :eek:


Can anyone shed some light on this?
 

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there is a way.


you need to wire up a relay to the engine check light and to something that turns on only when you turn the car on. maybe the fuel pump or something like that.

it would work like this...

relay stays closed keeping the light on
when you start the car the relay opens and turns the light off.


ps you didnt find a giant loop hole...
 

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sorry I can't add any insight into Cali emissions, but up here in WA, I just passed emissions today with flying colors with my DIYPNP! :)
 
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