ECMlink Air fuel est and wideband not line up

[gst-turbo]

ASTE INTO THE POST AND FILL IT OUT:

1). Any boost, vac, or exhaust leaks?
Boost leak tested 5psi above your max boost with no leaks?
No 25 psi
2). Verified mechanical timing?

3). Verified base timing?
Yess
4). Ignition system
COP or Stock Coil:
Wire brand and Age:
Spark Plug brand, type and Gap:stock ngk and ngk stock

5). Motor health (Compression Test)
Cylinder 1:
Cylinder 2:
Cylinder 3:
Cylinder 4:
Have not done text
6). Performed basic throttle body adjustments?
Idle Switch:
Throttle Cable:
TPS:
BISS:
Yes
7). Compression ratio
Stock
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:
Injector Size (cc/min):
Stock injectors
12). Properly calibrated and configured wideband sensor
Sensor Brand:
Calibration Date:
Aem and a month ago
13). Type of fuel
Type: pump 91
Percent of Ethanol:

14). Watched ECMlink how-to videos? Watch all of them
The car is almost stock had bolt on 16g, creeps bad at high rpm , stright pipe exhoust with a muffler , aem wideband, 255 fuel pump re wired with aftermarket fuel regualtor set at stock pressure. My problem is im new to tuning i kinda understand it but im stil learning hot link work i did a stock pull to see how the car is runing and air fuel est is 9.5 and wideband is 11.7 all the way threw. Im on pump gas i want to air fuel estimated same as wideband in the fuel tables so i can adjust fuel. Cuz my stock tables are set to 9.5 at wot and i know that not right. I dont lots of resurch but can figer this out. My wideband is on the rear o2 spot thanks for the help. I would post log but i dont even step drive it hard cuz it leaning out bad

 

[curt-s]

there will be a delay between afrest and your wb o2 as the exhaust has to travel the distance but what youre needing is mafcomp adjustments for the applicable hz ranges, or ve adjustments for the applicable cells. if youre lean as you indicate, increase ve or maf compensation % the appropriate amount based on the error %.

 

[tmoney20g]

alright, don't drive it hard, but get us a log of the following data:

get into 3rd gear on a road that's pretty empty, let it coast down to about 20mph, hold it steady at 20mph, then punch it, without hesitation, up to say, 5000rpm. don't have to do a full out pull to redline.

then post that log.

 

[gst-turbo]

1 and second gear I will get that 3rd gear tomorrow this is what I have at the moment

 

[gst-turbo]

3rd gear pull rev limiter at 5500 rpm

 

[tmoney20g]

ok, looking at the idle section of the 9.22 log, your airflowperrev is a little high at .26, so lower the 50hz slider a click at a time until it's at .24-.25, no big deal there. fuel trim looks good, needs no adjustment there.

onto the pull part, i don't see the wideband in the log, so i went looking to display it, don't see it in there either. do you have it hooked up to the ECU ?

Also, there are some tweaks that can be done to the DA tables as far as target AFR if you know you'll always be on 93 octane, etc.

 

[gst-turbo]

I upgrade to windows 10 so i had to re download ecmlink and dident have it on at the time but it reads 11.7 threw the whole pull i can make another one with wideband on but i saw im geting knock. At high rpm and im runing 91 pump gas

 

[gst-turbo]

My wideband is hooked up to rear o2 so it just on the rear o2 pin and not in the front maybe that why the air fuel dont match and im still trying to understand how to make them match using maf comp and puting new values of the log would that work?

 

[bonecollector]

Your electrical system is dropping voltage for some reason, This will also affect fuel trims... voltage consistency is important! so fix that first.... Due to the pulley size on the saturn alternator being different from the oem unit, they have a tendency to produce low voltage under 1000 rpm's.


Set your tps to the correct voltage, jafro has a how to video on youtube...
re-check your timing
re- adjust your isc position

Your injector duty cycle is maxed out.... The highest duty cycle any set of injectors should run safely is 80%, not 112% l.o.l

The reason why your afr est is hitting 9's is because That is what the cell in the OpenLoopMaxOct table is telling it to command.

turn down your boost to a stock level.

 

[tmoney20g]

Digital AEM Widebands are just the worst for our cars. I'm sure they're good sensors, they just don't play well with DSM ecu's. I've read that the analog AEM don't have problems. And you don't have it identified in the ecu inputs, the table at the top of that tab lists no external sensors. So I just copied all this off of facebook and decided to make a post for you to properly install your AEM wideband, if it's a digital one.

Copied from a post Scott Laird took a lot of time to put together on our dsmlink support facebook group:

Go to the Ecu Inputs tab and make sure you have Linear Wideband selected (selected in red). If you have something else selected, pick Linear Wideband instead. Once that's selected, Click Save Inputs (selected in black). Then click Captured Values (selected in blue)...

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After you click Captured Values, a box will open up and you're gonna look for Linear Wideband in the left column. Click ADD, then OK. Then go to your log screen and click F9 and you'll have a box open up like this. Once again you'll select Linear Wideband (in red), click Add to Display (in black), and click OK (in blue).

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Next, click start stream and then stop stream to make it show up in the log. You'll double click the Linear Wideband parameter that's added to the bottom (in red), then when the box opens up, you'll be looking for the upper right hand corner (black). You'll first enter numbers I'm about to give you here in a second and click Apply (blue), then OK (purple)

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You'll enter these numbers into the box in the picture above highlighted in black. Min Voltage: 0.0
Min lambda: 0.65
Max Voltage: 4.99
Max lambda: 1.32

Once this is done, if it doesn't match, you can try raising or lowering the Min Lambda number slightly to get it to match. I'll post back later for Option 2 on how to do this.

Okay, here's is option 2, but I've had situations where it doesn't always work correctly....for whatever the stupid reason. To start with, you'll need to take out the O2 sensor, get some gas or brake clean, and a rag.

Once it's out, you'll need to click F9 on the log screen then click the Raw Values tab in the middle and look for the one that's associated to the Wideband. Click it (in red), then OK (in black), then OK again (in blue).

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After that's done, you'll see the Raw voltage value for the wideband at the bottom (in red). Next, right click on the log screen and right click. You'll need to click on unit preferences that's already highlighted in the picture.

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Next, either use gas or brake clean and soak a rag and put the sensor in it. You'll see the readings change. When they max out, record both of those readings as well.

Now then, double click on your wideband parameter (this screen shot is taken from another log so the wideband parameter is not in the same spot as in the other pictures above) until the box opens up like this. When it does, input the minimum and maximum values of each into these boxes.

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Next, change the wideband back to it's original reading following the steps I listed above that you used to change it to Lambda. Now compare the reading while in open air, and then again, when put in the soaked rag. If everything matches, you're done. Put it all back together. If not, you may have to play around with the numbers like I listed in option 1 to try and get it to match.

Once again, all the above was written by Scott Laird

 

[gst-turbo]

Bonecollector i have the stock alternator at the moment im not sure what could be the problem with the voltage. I will look at the car tomorrow and see what i can find out. I will fix tps check timing and iac as soon as possible. I have some pte 1000cc injectors siting at home but i dont thing ill be able to get the car runing good that the reason i havent installed them. I want to learn a bit more before i put them in. If i change the fuel table to say 10.9 would the car run good on pump gas or would i have to adjust other things. I cant turn the boost down it creeps with the 16g to 19 psi i think i need to so some porting.

 

[gst-turbo]

Tmoney20g my wideband and air fuel estimale line up from the pic really close at idle but a wot air fuel estimated is around 9.5 and wideband is at 11.8 why dose this happen why isent it always the same?

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[tmoney20g]

That's where tuning comes in. AFREst comes from the max (or min) octane tabe in the direct access tables. for instance, if you're at 2000rpm @ x.x psia, then you'll be in a cell that says 13.8.

so click somewhere on your log, anywhere. then open the direct access table for maxoctane, in the top right click 'track datalog'. so wherever your cursor is in the log, the highlighted cell is the target afr the ecu is trying to achieve.

If you're already positive that link's wideband data matches the gauge-face data, and your target afr is 12:1 but you're getting 10:1, then that's where tuning comes in, and if you want to do it on your own, better get on youtube and watch every video possible, or hire a remote tuner.

 

[gst-turbo]

Got it thanks for the help

 

[bonecollector]

The voltage issue could only be a few things.
- Bad or weak alternator
- bad wiring
- bad or weak battery
- A overheated alternator rectifier will also cause voltage drops, and this is why people relocate them to the back away from the exhaust heat/housing.


out of curiosity what MBC are you using? have you tried hooking up the stock BCS to see if the "creep" stopped? Just a suggestion...
If you're 100% certain it is boost creep you're experiencing, then i would Definitely port the exhaust housing asap, Maxing out your injectors is fine, until it isn't...

 

[gst-turbo]

My battery is low i have had the car for a year know and it came with that battery and i have an extra one laying around that i only used for two months so im charge it and swap it in. Im runing the hallman mbc and it before it dident creep with stock exhoust but then i welded up a 3 inch stright pipe all the way from turbo to a muffler thats at the end. First pull log i did with it i notice how much boost i was making. I have not tried to hook up the stock bcs.