Set me straight

[trickyrix]

Took it back this morning and left a little gift on the console... it passed just fine (ahem). Last week everything looked good except the NOx. Never could get my serial-USB dongle to talk to MS, but I have that new spark table all ready to go for next year if I need it.

It doesn't hurt to know a guy if you have IT problems.

[sxk122]

My car passed just fine with the standalone hooked up... but then again, I know a guy.

So in other words, it didn't pass just fine.... you greased the way.... cheater

[trickyrix]

So in other words, it didn't pass just fine.... you greased the way.... cheater

...aaaaand what's wrong with that?

However... an OBD-I car can be made to pass the sniffer if you can tweak the tune a bit. With an OBD-II car, you're SOL unless you swap back to the stock computer or find some kind of Atari 2600 emulator or something.

[sxk122]

I'll need the addy of your place, cuz i'm not going back where i've been the last couple years after last years fiasco.

[trickyrix]

Sent you a PM.

Didn't that place bitch and moan about your steering wheel???

[black roadster]

But they are talking about modified Miatas, specifically adding FI and a full ECU. Owning 2 ODBI Miatas, one stock and one with FI and ECU, I can tell you the modded one does MUCH better on the rollers than the stock one every year. I hear the same thing from every other modified owner... A tuned aftermarket ECUs just plain runs cleaner.

Yep. See it all the time.

OBDII monitors way more than OBDI cars. It's way easy to get a CEL with FI miatas. Forget aftermarket ECU's as they will not "plug in" at the inspection stations so you are left with swapping the ECU back to stock. Then the stock ECU will not like your larger injectors, mid-pipe and who knows what else so every year you must swap a bunch of parts to get the all clear from the inspection station.

Now look at an OBDI car. Sure you have to pass a sniffer test but all you need to do is run an aftermarket ECU and load a "clean running" map. You can make it run cleaner than a Prius!

[MoonieGT]

Heavily leaning towards putting my NB up for sale at the end of the month...

[Yeller90]

Plus with a 90, only 3 more emission tests then we are free!!!!

[SirHustlerEsq]

Now look at an OBDI car. Sure you have to pass a sniffer test but all you need to do is run an aftermarket ECU and load a "clean running" map. You can make it run cleaner than a Prius!

The only thing that causes difficulty on inspections is NOx on batch-fire cars because we have to run them with ~17* of spark angle at idle to get them to behave reasonable. On sequential cars I run ~11* of spark angle and the cars pass the sniffer just fine. Sometimes they pass low and high-speed tests with 15.4:1 AFR, most of the time I adjust the AFR table (with EGO authority at 20%) to 14.7 and they pass just fine.

When my car had the turbo, it once passed inspection on the rollers with no cat, lol. Now that it's 11.5:1 there is no way in hell that car would ever pass the sniffer, NOx overload.

[GroceryHauler]

At what point does it become a problem with getting CELs on OBDII cars? You guys are starting to make me regret my relatively recent purchase of a 97. How much reliable non-CEL (stock or piggyback ECU) power can you get out of OBDII?