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ECMlink Quick Question About VTA and Speed Density

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Lolmooses

Proven Member
73
2
May 26, 2014
portland, Maine
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.
 

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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.
 
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