ECMlink Link Help. Idles fine but pulls timing when it hits boost

[n0de]

My car idles strong, drives strong (out of boost), but if it sees anything over 0psi of boost (map sensor) it goes ape shit and starts pulling timing/falling on its face.

The cars is setup with speed density, 1450cc bluemax injectors using 93 octane fuel, 43.5 psi of fuel pressure. Both attached logs were around 20-35mph in 2nd gear.

 

[n0de]

Really? 4 days and nothing?

 

[jery1234]

The engine is not running at operating temperature, you should fix that first .

 

[talontd92tsi]

Your global fuel is set for 1650 cc injectors on 93, thats your biggest problem.

Fix that and start over. Should be -63.9% @ 43.5 psi base pressure.

Your dead time is WAY too high because of that.

Also, check the "Disable maf compensation w/SD operation" check box in the Maf Comp tab.

Holy cow... your SD table is frightening too.

You have 30% jumps from cell to cell, and a cell as low as 15.5%. it should NEVER be that low.

Also, (just guessing here) you were making changes to things during this log?

This makes things difficult to diagnose, its like hitting a moving target. Regardless. Fix those few things and report back.

 

[n0de]

I did what you asked but the injector calculator suggests -69.3, was your -63.9 a typo?

 

[talontd92tsi]

Yes, it should be -69.3. Sorry about the typo. That should help bring your idle SD cells back into reality, and your deadtime out of the stratosphere.

 

[n0de]

Car runs much better now. Shortly after my original post there was a facebook dsm member that helped me out with the SD map. Between changing the fuel settings, SD map, and setting the Knock sensor controls to activate >3500 rpm & > 35% throttle the car can get into (so far tested) low amounts of boost without falling on it's face.

 

[snowborder714]

Any idea what happened to your coolant temp? It just dropped all of the sudden from 226° to 28° at 22.749 seconds. That's something that would concern me.

Next thing you'll want to do is adjust fuel settings and SD table get your SDAirflowPerRev down. It's very high at idle and should be down near .28-.30 with cams. You might want to do some research and see how the 2.3L affects that as well, if at all.

 

[n0de]

About the coolant temp, I've been getting a code (cant remember what it is) every now and then about the front o2 heater malfunction. For whatever reason if i select the "lock coolant temperature" box from the "ecu input tab" (which locks it at 226°) for a few seconds then the o2 sensor starts to cycle and puts me into closed loop. I may have to change my o2 sensor because of that, but it seems to be cycling ok. The sensor is new (as in I just opened it and installed it less than 6 months ago as I was building the car, it has only been activated within the last two recent months during first start up).

I do need to adjust the airflowperrev's that's my next step. The airflow per revs from what I've read are acceptable within the parameters you've listed (.28-.31). The only thing I see the 2.3L could be affecting is the harmonics that the knock sensor reads, could've been throwing it off before when I had those issues... Idk.