Cobb AP

TheNewBlack · Postby **TheNewBlack** » Fri Mar 12, 2010 9:14

Yeah let us know what the code is exactly, i've never heard of this happpening on a stage 1 map. Especially with basically no mods the generic map should work pretty well.

*DarthRX8* · Postby ***DarthRX8*** » Fri Mar 12, 2010 9:14

I have seen many people who have stock 8's run the Stage 1 map and been very unhappy.

It is a generic map and is nothing compared to a true tune. If you want to expierence the full benifits of the AP get it tuned.

Definitly wait until you get to TX or you can purchase a tuning service from mazdamaniac and get 6 months of tuning (send your logs VIA email). Then you could have CO maps and TX maps!

EDIT! He is offering tunes for $299.00! If you would have bought your AP initially it is $99.00.

bellalyssa · Postby **bellalyssa** » Fri Mar 12, 2010 9:14

Where in Texas are you going to be? Cobb tuning just opened up in Plano, if you wait to get it tuned there it's guaranteed to be right or they will tell you what's causing the problem.

94R2CSprings · Postby **94R2CSprings** » Mon Mar 15, 2010 9:14

Here's the shortest of the 3 datalogs I have. I deleted several seconds of low RPM time. Can anybody identify anything abnormal here? When I accelerate hard, as the engine gets up to around the upper 5000 range (sometimes in the upper 4000 range too) it all of the sudden decelerates violently (like someone slammed on the brakes) even though I still have my food on the gas.
Thanks fellas
Jeff

tbot · Postby **tbot** » Mon Mar 15, 2010 9:14

you should get on MSF. They have some WAY smarter people on there when it comes to this stuff. They're a bit abrasive, but if you can get past that, your money when it comes to these kinda problems.

*DarthRX8* · Postby ***DarthRX8*** » Mon Mar 15, 2010 9:14

Can you put the field names on the attachment, STFT, LTFT, MAF, Accel Pedal Position, PSI, etc?

Just glancing at it (and I am by no means any type of expert or even novice), you are running very lean at WOT and your MAF is low for FI.

If I could see the field names I might be able to tell you more. Chickenwafer would be able to help out a lot! I would PM him.

94R2CSprings · Postby **94R2CSprings** » Mon Mar 15, 2010 9:14

Made it shorter and it should now have the heading across the top row.

chickenwafer · Postby **chickenwafer** » Mon Mar 15, 2010 9:14

Your MAF scaling is wayyyy off. Your Calc Load is too low as well as Gram/sec of MAF airflow. Can you up the sampling rate for your datalog? It looks almost like it's missing pieces.

tbot · Postby **tbot** » Mon Mar 15, 2010 9:14

It looks like you need to add more fuel. The LTFT is always adding fuel when you get on it. Fuel pressure looks good tho, so its most likely the map. Basically when you get on it, you want 0.00 for both STFT and LTFT. Also, it looks like your boost is low, only 13psi?

tbot · Postby **tbot** » Mon Mar 15, 2010 9:14

Actually chicken...those calc loads look to be about right for the speed motors, at least in everything I've read about them.

chickenwafer · Postby **chickenwafer** » Mon Mar 15, 2010 9:14

You guys are only seeing 150% at WOT? That just seems low to me...if so you have a bunch of overhead.

But improper MAF scaling will effect EVERYTHING, LTFT, STFT, AFR's, closed and open loop conditions, timing, Calc load, everything....

94R2CSprings · Postby **94R2CSprings** » Mon Mar 15, 2010 9:14

Thanks guys. Did any times stand out as obviously way out of whack? I get this violent deceleration when my "problem" happens. Its like somebody slams on the brakes even though my foot is still on the accelerator. Why would their OTS map perform so badly? I do have a K&N, could that cause this?

chickenwafer · Postby **chickenwafer** » Mon Mar 15, 2010 9:14

Trying to make ONE map to perform on ALL MS6 cars across the country is an insane and impossible task. This is why OEM's build in so much protection into OEM tunes...not because they want to sap power but because the USA is one giant country...HUGE changes in elevation, temperature, weather, etc, and making one single map to encompass all of those variables is almost impossible, so they make it as safe as possible. COBB does the same thing- they absolutely don't want any blown motors on an OTS map (even tho this has happened) so they make it safe...sometimes too safe. Sometimes there are problems.

This is why a custom tune is always better- suited for your unique motor and elemental conditions.

94R2CSprings · Postby **94R2CSprings** » Mon Mar 15, 2010 9:14

Here's another datalog where I think the problem might be a little more apparent.

tbot · Postby **tbot** » Tue Mar 16, 2010 9:14

Yeah chicken, I'm only seeing 150-160 for load. I know on some MS3's they see higher...around 190-200ish, but from what I've read on our cars (the 6) that looks right.

Cobb AP

Data log w/ problem from AP OTS Stage 1 93

Reposted Data log

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