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ECMlink Car stays in open loop

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phantom_19

15+ Year Contributor
410
2
Oct 13, 2007
curacao, South_America
Any boost, vac, or exhaust leaks?
Boost leak tested 5psi above your max boost with no leaks?
Small injector leak
2). Verified mechanical timing?
yes
3). Verified base timing?
yes
4). Ignition system
COP or Stock Coil: stock
Wire brand and Age: dont remember
Spark Plug brand, type and Gap: bpr6es

5). Motor health (Compression Test)
Cylinder 1:150
Cylinder 2:150
Cylinder 3:150
Cylinder 4:150

6). Performed basic throttle body adjustments?
Idle Switch: working
Throttle Cable: good
TPS: 0.65v
BISS: no

7). Compression ratio
stock pistons
8). Any known bad sensors or brittle wiring?
maybe o2?
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: 37 psi manual car
Injector Size (cc/min):560cc

12). Properly calibrated and configured wideband sensor
Sensor Brand: bosch
Calibration Date: 3 months

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

14). Watched ECMlink how-to videos?
yes

Car stays in open loop.
I have checked the required values for going into closed loop. The only reason I can find is that the o2 is not cycling, but that is because it is stuck in open loop right? I cannot say its a new sensor. Even though I have no issues with being rich or lean. 0.02v on ecmlink, and it shows a steady 14.5 - 15.1 afr on my AEM gauge
 

Attachments

  • log.2016.12.08-03.elg
    96.3 KB · Views: 56
You don't have your WB setup at all so I'm not sure how you can confirm it is not cycling or if its showing 0.02V

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0.02V is not a middle value for cycling....it is basically 0V. it should be around 2.5V (ie halfway between 0 and 5V) if you are using the WB on the Front 02 input on ECMLink.

For a narrowband the range is 0V-1V I believe so it should be at 0.5V if you are around 14.7.

Are you using the AEM on the Front/Rear 02 input on ECMLink?
 
Sorry If I didnt specify. I have not put the wideband on ecmlink. I just have the regular front o2 sensor that reads to 1V. I was looking to get answers why that one is dead on idle. But when driving the car goes in closed loop and cycles the o2 sensor normally for a while. After that it goes to a almost static voltage. This log shows a lil more. The voltage in the o2 does change. And it is in closed loop for some reason
 

Attachments

  • log.2016.12.08-01.elg
    175.7 KB · Views: 44
Ah. Gotcha. Soooo if your using a stock O2. It should cycle around 0.45ish

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Your NBO2 is cycling strangely for sure. If you display AFREst you can see it drifts leaner and leaner towards the end of the log.

I'm thinking there is an issue with your NB since it drifts and seems so patchy.

Can you wire in your AEM WB? It's gonna be far superior to the stocker and will allow you to log actual AFR's
 
Last edited:
Why when I drive or something it changes? So I should wire the WB into pin 4 of the ECU? What drawbacks does this have? It is set in the downpipe right now
 
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