RazorLab

iTrader: (8)

Currently E79 but it's been the same on E13 (91 Octane), E50, E65 and E72. With flex rom turned on (extrapolating) and turned off (non-extrapolating).

Basically I've tried a bunch of stuff, which is why I am frustrated. Hahah.

mrfred

iTrader: (50)

Are you running the stock air flow metering routine, i.e., you're not running the SD-only routine that's out there?

LetsGetThisDone

iTrader: (1)

Try a new front O2 sensor?

RazorLab

iTrader: (8)

Yea stock routine, MAF + MAP. 3.5" intake

MAP and MAF follow pretty close at WOT:
https://datazap.me/u/razorlab/rcptri...24&zoom=54-319

Pretty close at idle, could probably get it even closer:
https://datazap.me/u/razorlab/rcpidl...ta=10-27-29-30

Almost spot on at cruise:
https://datazap.me/u/razorlab/rcpidl...zoom=2159-4688


I might do that... however if the car is really running lean with trims out of the equation, aka not even using front 02 sensor, then I don't think it's the 02 sensor.

LetsGetThisDone

iTrader: (1)

But you said it runs weird on the trims, not just that it's lean... Or even when you have it in open loop, you can't get it to richen up?

RazorLab

iTrader: (8)

When I turn trims off:

If I keep trims on, after about 15 minutes of driving after resetting trims (pulling #2 fuse), LTFT goes max +12.5 and STFT still adds +6 or so on top of that at idle. If I start going from a stop light, with any throttle it goes really rich, into the 10's and stumbles. So, basically drives like crap and floods the cylinders with throttle tip in.

One interesting tidbit, with trims on and reset, the first 10 minutes or so the car idles really high when coming up to a stop, like the idle flares up and sits there. I'm assuming it's because it's drenching the cylinders with fuel.

With trims OFF, it does not exhibit that characteristic.

I did try to richen up idle in open loop but if I got it to idle closer to stoich, it would then go really rich on tip in like it did when it was in closed loop with trims compensating.

mrfred

iTrader: (50)

How are you attempting to richen it?

Also, on the Evo 8/9, if you disable the fuel trims, the ECU switches to another routine to attempt to control AFR at idle. Stopping this alternative routine requires tweaking one table. I wouldn't be surprised if the Evo 10 also has this alternative routine. If my memory serves me correctly, its pretty obvious when its working because AFR will exhibit periodic cycling.

RazorLab

iTrader: (8)

I richened it up via a combo of fuel cal table plus injector scaling.

Do tell about about the alternative routine and table...

mrfred

iTrader: (50)

What ROM ID are you using?

mrfred

iTrader: (50)

By fuel cal, do you mean the injector linearization table?

RazorLab

iTrader: (8)

59580004

The fuel calibration table. Big table with %'s over RPM and load (to 320). I believe we originally called it the InjectorPulseWidthAdder table.

mrfred

iTrader: (50)

I forgot to bring my PC laptop with me this week, but what's that table address in earlier ROMs?

RazorLab

iTrader: (8)

In my ROM it's:

In the 2008 GSR 52680015 ROM it's:

LetsGetThisDone

iTrader: (1)

The fuel Cal table is basically 3D speed density since the X runs off of a mix of the MAF and speed density. So, adjusting fuel cal table is like play with MAP/VE and RPM/VE tables in an 8/9 rom, Mychailo.

RazorLab

iTrader: (8)

I took the car out yesterday for about two hours and it's still totally sensitive. Some pulls are semi clean (2 counts or less) and some are just knock city, 8+ and that is where I have the ECU pull throttle. This is also with like no timing (3* to 9*) and 24-25psi. It's driving me insane.

So... I tried doing another boost leak test today. I cannot get this damn thing to hold any air. I have no idea wtf the problem is. I even bumped the motor over a couple times and tried to fill the system with air each time. The air goes in and the couplers get firm but as soon as I stop feeding it air, it all comes out as fast as it goes in. The problem is I cannot hear it leave. I can hear a VERY faint air sound towards the back of the motor.

Can I get a sanity check here? Did I forget how to do a boost leak test? Am I forgetting something totally stupid?

Here is what the engine bay looked like during the test (I put a 4" boost leak testor on the compressor housing).



Here is what it looks like all together: