Tuning with fuel trims

[68problemchild]

I found this but its lacking detail for the lap top and V2 wiring.
http://www.aemelectronics.com/Images...%2030-2310.pdf

Thanks!!!

[swingtan]

Simon, after I get the MAF dialed in, what table do I use to start tuning on for fuel?

Can I get that in English please?

RE: Table, are you highlighting data and then looking at the details? If so then yes, use the average, but it's not the best way. Using the BEN map will allow ScanTool to gather the data for all values and then average them automatically, across the entire log file.

RE: AEM controller, the AEM has a serial data steam and the V2 is already capable of understanding the AEM data. So all you would need to do is to use an adapter plg from the AEM to the V2 and to select "AEM UEGO" from the serial wideband option in settings.

TAQuickness did a tutorial .....

http://forum.efilive.com/attachment....4&d=1220567224


Simon

[joecar]

I found this but its lacking detail for the lap top and V2 wiring.
http://www.aemelectronics.com/Images...%2030-2310.pdf

Thanks!!!

In that doc, see Fig. 5.

Does the AEM come with a serial cable (that has a DB9 connector on one end)...?

If the AEM connects directly to a PC/laptop using that cable, then it will connect to V2 with a null-modem adapter used to join the AEM cable to the V2 cable (see the LC-1 example).

Does TAQuickness offer ready-made AEM cables...?

[68problemchild]

It came today.

No connectors just five wires.

OK so red can go to switched power. Black can go to ground.

That leaves:
WHITE - Connect to Lambda + Input.
BROWN - Connect to sensor ground. Connect to power ground if sensor ground is not
available.
*GREY – Connect to RS232 serial port on laptop/pc. See section on Serial Data
Viewing
*optional – only needed for laptop/pc viewing of data.

So grey to pin 5 on the RS 232 connector then to null modem then to top of V2 and that is it?
Do I need to tell the tuning software X volts = X afr? Or I just set V2 to "AEM"?
That would leave brown and white unconnected.

Thanks!

[nevinsb]

You are hooking this up to your laptop, or the V2? The V2, just take a piece of phone cord and attach the ground/serial to it. You don't need a DB9 or null modem. Think TAQuickness had instructions for getting it hooked up on his site.


http://www.taquickness.com/taqcables/TAQCables_sGEN.pdf

Just noticed too, mine had a blue wire for serial, the directions might need to be updated.

[68problemchild]

That is helpful.

Looks like

Phone cord/V2 to AEM

White to AEM Nothing
Red to AEM Grey (Serial - ??)
Orange to AEM Brown (Sensor Ground)??

CarPos switched to AEM Red
Car Ground to AEM Black

This scenario leaves both white wires unconnected. White on AEM is supposed to "Connect to Lambda input". Whatever that is.



PS, my phone cord has 4 wires. Red, Black, Yellow, Green.

[joecar]

Yes, it looks to me like you simply do this (in addition to power/ground):

AEM Grey -> V2 RJ12 pin 2 (Rx)
AEM Brown -> V2 RJ12 pin 5 (Gnd)

[joecar]

AEM White (Lambda +) is used for sending Lambda to the logging device (V1 or V2) as an analog voltage.

You don't need this, so just tape it off.

[joecar]

The pics/diagrams in this thread show pins 2 and 5 on the RJ12 plug:
showthread.php?8115-FlashScan-to-LC-1-Serial-Cable-Diagram

take note, in the pics/diagrams the RJ12's lock tab is facing away from you.

[68problemchild]

Thanks Joe. When I put my "phone plug" into V2 have four phone wires (I am guessing this is an RJ12 plug with 6 potential wires) hanging to mate up: Black, Red, Green, Yellow.

Sounds Like AEM grey goes to position 1 wire on the "phone plug"?
and AEM brown goes to position 5 wire on the "phone plug"?

Thanks for all the help. Will wire in tomorrow and hopefully be rocking with Swingtans tutorial.

Unrelated, When I replace the wide band in one bank for one the NB, wont the motor run like crap with just one NB functioning or do they become irrellevant while tuning?