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ECMlink Switched to Speed Density, now a rough cold idle tries to die until warm

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96dsmftw

Supporting Member
288
232
Jun 23, 2011
Richmond, Kentucky
1). Any boost, vac, or exhaust leaks?
Boost leak tested 5psi above your max boost with no leaks?
Yes
2). Verified mechanical timing?
3). Verified base timing?
4). Ignition system
COP or Stock Coil:Stock
Wire brand and Age:NGK, about a year
Spark Plug brand, type and Gap:BPR7Es

5). Motor health (Compression Test)
Cylinder 1:160
Cylinder 2:160
Cylinder 3:170
Cylinder 4:180

6). Performed basic throttle body adjustments?
Idle Switch:yes
Throttle Cable:Yess
TPS:Yes
BISS:Yes

7). Compression ratio
stock 2g
8). Any known bad sensors or brittle wiring?
no
9). Any DTC/CEL codes?
no
10). Electrical system
Car off (not running):
Car running:

11). Base fuel pressure and injector values
Base Fuel Pressure:stock 2g
Injector Size (cc/min):pTE 880cc

12). Properly calibrated and configured wideband sensor
Sensor Brand:AEM
Calibration Date:

13). Type of fuel
Type:93
Percent of Ethanol:

14). Watched ECMlink how-to videos? Yes

So, I had the car tuned well while running a 2g MAF. It idled well cold and warm. Decided to switch over to speed density, watched a few videos and read the PDF about the 1g. Got the sensors hooked up, kit from ECMLink with the mitsu style pressure sensor. Everytime I try to start it up it idles rough and lean without cycling. If I let it go it will die a time or two until it gets warm. Once it gets warm it idles well and I got it tuned out idle, cruise, and WOT(almost). I looked around and coolant temp fuel adjust and tried to make changes to it to add fuel while cold but it is still pegged lean and am not sure how far I should really go. I need some help, please. Attached are 3 logs from trying the coolant temp fuel adjust. The other is from before I made changes.
 

Attachments

  • Before changes cold start.elg
    306.5 KB · Views: 52
  • cold start 1st try.elg
    163.9 KB · Views: 47
  • cold start drive around.elg
    330.9 KB · Views: 47
  • cold start second try.elg
    59.4 KB · Views: 58
On your tab for ECU Inputs why,do you have baro set to omni power 4 bar?

Set it to factory.
On boost WGS uncheck enable boost control
On maf clamp tab check use manifold pressure (MAP)

For fuel you need to set global fuel for your injectors. 880c is -48.8%, deadtime 235


Reset your speed density tab to stock.
 
You got it. I did everything but the fuel and table stuff. It must have been the baro input because it never even sputtered like it wanted to die. I saw it in a guide somewhere so I figured it had to be in there. Oh well. Thanks!
 
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