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reconbygod12 · Postby **reconbygod12** » Fri Sep 17, 2010 9:14

So i put my cobb accessport stage 2 map in and ever since i did that its throw to lean at idle codes up is that something to be really concerned about and i removed the code through the cobb and it continues to pop back up...with all the parts is their just to many parts for the cobb map taht i would have to take it to be tuned by someone else

rmeeker13 · Postby **rmeeker13** » Fri Sep 17, 2010 9:14

What kind of intake are u running? If its an aem or mazdaspeed that could be ur problem.

reconbygod12 · Postby **reconbygod12** » Fri Sep 17, 2010 9:14

im running a cobb intake and the cobb turbo inlet cobb down pipe and exhaust and forge bov

erod550 · Postby **erod550** » Fri Sep 17, 2010 9:14

Do you have a dashhawk? If not, using the AP, look at your AFR at idle. Should be in the 14s. Also look at your STFT at idle. Should be between -10 and +10. When I was getting Too lean at idle it was because of a vacuum leak.

Also make sure you're using the map designed for the Cobb intake, not the Mazdaspeed intake. It makes a difference.

reconbygod12 · Postby **reconbygod12** » Fri Sep 17, 2010 9:14

i am using the cobb map with sf intake from cobb and i dont have a dashhawk but i will look at those thanks for the input otherwise do you know wehre the vaccum leaks are more common on the speed 3's

tbot · Postby **tbot** » Fri Sep 17, 2010 9:14

my guess is ur MAF calibration is f'd up which would also lead me to believe ur fuel trims are f'd as well. this all means, download access tuner race from cobb and start tweaking that map ur running.

tbot · Postby **tbot** » Fri Sep 17, 2010 9:14

or ur maf sensor is dirty...that could be an option as well

erod550 · Postby **erod550** » Fri Sep 17, 2010 9:14

My vacuum leak was on a T fitting I was using as a reducer from the large stock vacuum line to the BPV and the smaller connection on my Synapse. I had the T capped off and the cap came off, causing crazy high STFTs and idle in the 16s-17s AFR. If your STFTs are +5-25 it seems like you probably have a leak somewhere. Are you running an aftermarket blowoff valve? I would check any lines you messed with there if so. That's where my problem was.

And yea I have read that a dirty MAF sensor can cause P2187 as well.

rmeeker13 · Postby **rmeeker13** » Fri Sep 17, 2010 9:14

^^^ What tbot and erod said! Maf calibration, dirty maf, leak...also check the where the inlet pipe meets the turbo inlet, probally not the case but hey, check everything!

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