Codes P0131 and P0171
 

Hey guys,

I was going to the post office today to send out some packages, and about 2-3 minutes after starting, the engine would hesitate at part throttle and sort of misfire during idle.

A minute after, the CEL came on.

Runs fine if I give it a full throttle run.

I checked with my ScanGauge, and got a DTC P0131 and a pending P0171 after I cleared the P0131. The P0131 comes back if I switch the ignition off and start again.

I didn't have my laptop to connect to the MS3.

Halp?

Looks like they are related to oxygen sensor and maf.

Thanks, I'll go for a ride with my laptop and see what TunerStudio has to say. Perhaps its time to change my wideband sensor.

When was the last time you calibrated it?

IIRC about 6 months ago with my last oil/filter change.

Get a Zeitronix and don't care about that shit anymore... ;)

Probably needs to be re calibrated and get an oil change too.

OBD codes still function with megaquirt?? *mind blown*

If its running just Fuel/Spark with MS I'd imagine so. If your Fuel is off or ignition table the Stock ECU is probably gonna pick up some codes. I never ran a MS this way but thats how I picture it.

This was also very interesting to me ;)
Rev has a "special" megasquirt.

Piggyback = OBD codes
Standalone = No more OBD codes

Sorry for the thread jack...

You realize this is Rev we're talking about right?

Not some n00b. He forgot more about MS than most of us ever knew

Yeah, this MS3 supports 60+ codes, CCM monitors and realtime OBD-II data. There's no stock ECU in the car.

K, tks bye.

:drool:

Enhanced MS3 baller edition

More likely Extreme MS3 or something.

Yes we all know, that we want this bloody damn thing now! In all it's glory! Did I mention NOW...

shutupandtakemymoney.jpg? :)

If you ever start selling these. I would pay good money. I might finally buy an OBDII miata.

If I start selling these? :)

Maybe Rev put up this thread to see who would notice....

Announcement in 3, 2, 1...

Laws against selling OBD-II capable aftermarket ECUs, the U.S. Has them.

On the other hand, if Rev is willing to provide the equipment and knowledge to help you "upgrade" your stock ECU with MS features, then that's his deal, and it should probably be discussed privately.

"For off-road use only" - is used for many reasons

All aftermarket ECUs are illegal for anything but offroad use.

OBD-II in this context, is available mostly for ScanGauge-type readers, if you want to be able to monitor/diagnose things without having a laptop without you all the time.

I'm imaging this...

Plug in Bluetooth OBD reader...mount phone, open app and view OBD codes/settings on the fly...phone would double as a gauge when in car with APPs like "torque" and others.

The scenario above will work right out of the box with no adjustments/configuration required.

Obviously you can't "configure" anything over OBD-II. You can view live data (RPM, TPS, CLT, etc), you can view any pending or registered codes, and you can clear these codes.

my attention has been gained.

....there is hope for us OBDII cars that have to pass a computer test now. MY OH MY!!!

I realize this is an old thread, but the above post needs to be answered because this thread will come up for people doing searches on OBD2 emissions.

No, there is no hope for you in this case. Rev's OBD2 module does return some OBD2 codes - but none of those are the ones checked in an OBD2 emissions check. No non-oem ECU can return those emissions codes legally.

What you CAN do, if you want to modify your engine and still meet OBD2 emissions, is run some sort of piggyback. I personally have run an XEDE for 4 years now and have passed my state's OBD2 emissions test twice. Which is only fair, since all of my emissions equipment has still been on the car.

Well the scope of this ECU will be to able to pass emmissions, because it will do everything the stock ECU will do to keep the pollutants as low as possible and even more.

Don't expect it to be cheap though.

My interest, you haz it ;)