WideBand installed, hlp plz!!

[slow6]

I got my AEM installed right infront of the high-flow cat, @ the y-pipe.
It doesnt really read good when I start it up, it reads "---", or goes crazy.

The instructions say "Connect to a switched 10-18 volt power source utilizing a 10Amp fuse" for power (+). I tapped into my fuse box on the drivers side. I used a 15Amp fuse. Could 5Amps extra make my readings off?

My readings stay mostly around 15.3:1
Sometimes as high as 18s!!!
So, it seems that tuning Cpen & Closed loop could get me better MPG (if I could set it at 14.7:1 AFR).
The only problem is, under my Editor, on the "Open & Closed Loop" tab, there is no way to adjust it. The only options are Closed loop delay and the temp for when closed is enabled!!!

Any help is greatly appreciated!!!

[S2H]

I got my AEM installed right infront of the high-flow cat, @ the y-pipe.
It doesnt really read good when I start it up, it reads "---", or goes crazy.

The instructions say "Connect to a switched 10-18 volt power source utilizing a 10Amp fuse" for power (+). I tapped into my fuse box on the drivers side. I used a 15Amp fuse. Could 5Amps extra make my readings off?

amperage of a fuse does not affect voltage...
voltage will be 12-14 volts on a car reguardless of how big of a fuse you put in....the fuse is just a way to limit th etotal amperage so you dont fry wires that werent designed to handle anything larger.

My readings stay mostly around 15.3:1
Sometimes as high as 18s!!!
So, it seems that tuning Cpen & Closed loop could get me better MPG (if I could set it at 14.7:1 AFR).
The only problem is, under my Editor, on the "Open & Closed Loop" tab, there is no way to adjust it. The only options are Closed loop delay and the temp for when closed is enabled!!!

set closed loop enable temp to the highest # it will let you..that should do the trick..

also try using the VCM controls to see if you are truely in open loop..turn closed loop off..if you see LTFT/STFT then you are still in closed loop
also reset your fuel trims before you do any wideband readings for the first time in open loop

also double check your wiring..several people on here have had issues with their AEM device....it was usally a grounding issue if I remeber on most of them.

[slow6]

my grounding seems fine, its connected to the chassis, but I could put it directly on the (-) negative battery terminal post.

How am I supposed to tune to 14.7 in Open loop?
thanks

[S2H]

if grounding is good..then it means that your MAF table needs correcting...
set up a histogram that is your MAF table and log
MAF hz
AFR
Commanded AFR

with just these 3 things you can plot AFR error %(it a custom PID already in your 2.0 software)
adn then its a direct Multiply by % into the table in the editor

you will be remapping your MAF table in this way...

you can leave PE enabled just as it is stock so that your commanded PE will be correct as well

[slow6]

yeah, about that, I said that it takes awhile before the gauge starts reading accurately... well, I Actually read the manual and it says that you have to let it warm up for 20 seconds. So, I was just trippin, I guess..
Can I really edit my Open loop AFR?

[S2H]

also you can just turn on your car and let the exhaust warm it up...
you will shorten the life of the sensor if you let it warm up in the pipes as it will cause moistire to condense and will get into the sensor pumps and muck them up..


I idnt say you were goint to edit open loop AFR...I said you were going to set the table in open loop using AFR...big difference....
this will allow you to correct the curve of the MAF and then you will have more correct fueling to begin with in closed loop....

[slow6]

sensor pumps?
my bosch LSU4 wideband has a pump in it? wow

I thought I was supposed to set the closed loop enable ECT temp as high as possible, so closed loop wouldnt enable?
sorry I'm so slow
Thanks!!

[S2H]

thats what I said..closed loop ect to a high number....
but you still have to double check to make sure its in open loop

[slow6]

I can set closed loop enable ECT to 284 F which is max.
I can also command No closed loop in the scanner's VCM tools(like you said).

So, I just turn off my closed loop.
Do I go for a drive in open loop or something?
How can i "set the open loop's table using AFR?
...which will get me closer to correct fueling once I switch back to closed."

[slow6]

I understand that my fueling is gonna be taken care of by the computer...
I wanna jump in and start tuning it to 14.7 (which it is way off)

Here is my scan:
I had my ECT closed enabled set at like 284, but the LTFTs kept on Learning.
The STFTs werent learning, so I set my "Fuel Trim Learn" in the VCM controls to disable, then I reset the "Fuel Trims" like halfway
through the scan.

PLZ HELP!

[slow6]

what table do I set in Open Loop using what AFR?
Sorry, I dont have the EIO yet, cause they dont have any.

[S2H]

what table do I set in Open Loop using what AFR?
Sorry, I dont have the EIO yet, cause they dont have any.

post your current .bin or .hpt file...
I'll take a look and post some pics or a new bin for you..

easier to show you with your file....

[slow6]

note that my "Closed loop Enable" is set to 284F.
I cant find an extra way to double check that I'm still in OPEN.
My Air Fuel Ratio error is always at -100%
I badly want to learn to tune!
My tune is such pooo

[slow6]

my AFR is all over the place, even in OPEN loop
13.0:1 - 18.3:1
Its outta control!

[S2H]

I havent had any time to take a look....
I will try to take a look here in the next few days

[slow6]

if grounding is good..then it means that your MAF table needs correcting...
set up a histogram that is your MAF table and log
MAF hz
AFR
Commanded AFR

with just these 3 things you can plot AFR error %(it a custom PID already in your 2.0 software)
adn then its a direct Multiply by % into the table in the editor

you will be remapping your MAF table in this way...

you can leave PE enabled just as it is stock so that your commanded PE will be correct as well

Let me get this straight:
1) set "closed ect enable" to 284F (max)
2) use "VCM controls" to "disable fuel trim learn"
3) click "reset fuel trims"
4) Make sure "LTFT/STFT Learn" is disabled

My "MAF Hz" , "AFR error %" , and "commanded AFR" are already being logged on my "Table display".
I dont have the EIO yet, but AEM has a easy way to datalog your WB to HyperTerminal.

My AFR error % is always -100% according to the "Table Display"

So I multiply by % into
what table in the editor?
to remap the MAF.

I think you mean the "MAF Airflow vs. Output Frequency" table which will remap the MAF for fueling calculations.
thanks

[slow6]

so, I guess I have to have EIO, so HPT scanner can figure out the correct AFR error % to multiply by.

[viper04af]

i'm no pro tuner, but what the hell did you do to that tune , the spark looks okay

Why would you not want close loop

why are you only commanding a 13.5 AFR with no RPM adder? i understand it makes it a bit less hard to tune but at 5700 RPM you going to need to add fuel (more air )

yes you need the EIO to log the WBO2

the AEM WBO@ has biult in heater... you don't have to wait 20seconds to start the car.... turn key let pump prime and start the car....

[slow6]

so I should always stay in Open Loop? Why would you not want Closed?
when it goes into Closed Loop it takes a second, but it starts commanding 14.7 and stays. However, my REAL AFR is like 15s, or 16s aggghhh!

No, I'm not saying I turn on AEM, wait 20 seconds, then start car.
I AM saying that I turn on car, wait 20 seconds, then turn on AEM (once the exhaust gas is hot so it doesnt damage the sensor).
Thanks alot for your 2 cents!! Any feedback is better than NO feedback!!

[slow6]

How do YOU get YOUR Daily Driving REAL AFR to stay @ 14.7?????
pray tell my good man!!