ECMlink Quick Question About VTA and Speed Density

[Lolmooses]

1). Any boost, vac, or exhaust leaks?
Boost leak tested 5psi above your max boost with no leaks? Yes

2). Verified mechanical timing?
Spot on

3). Verified base timing?
5*BTDC

4). Ignition system
COP or Stock Coil: Stock
Wire brand and Age: NGK 1 Year old
Spark Plug brand, type and Gap: NGK BPR7ES 0.28"

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

6). Performed basic throttle body adjustments?
Idle Switch: Simulated
Throttle Cable: Yes
TPS: Yes
BISS: Turned all the way down, still wont go to 30

7). Compression ratio
7.8:1

8). Any known bad sensors or brittle wiring?
No

9). Any DTC/CEL codes?
No

10). Electrical system
Car off (not running):12.6v
Car running:14-14.5v

11). Base fuel pressure and injector values
Base Fuel Pressure:37
Injector Size (cc/min): 450

12). Properly calibrated and configured wideband sensor
Sensor Brand: MTX-L
Calibration Date: Late February 2016

13). Type of fuel
Type:91
Percent of Ethanol:10

14). Watched ECMlink how-to videos?
Yes


Is it normal for the vehicle to go rich for a split second after letting off the throttle when venting your BOV with SD? I know thats to be expected when you VTA with a stock MAF, but why does it still happen to a lesser degree with a SD setup? The car doesnt bog down or anything when this happens.

 

[bling5tatus]

Yes, the lower portions of your fuel map still are set to use fuel. It's not until the ecu code kicks in a split second after you release the throttle that it cuts fuel and goes completely lean. Your car is doing what is normal.

 

[Lolmooses]

Thank you for confirming that. I decided to look at other peoples logs and indeed the same occurs in theirs. Good to know its normal .

 

[bling5tatus]

No problem.