ECMlink DSMLink AFR Help!

[johnny boy 93]

Hey guys, Well I just got my DSM Link Installed and I am doing some logs and I just finished this one. Right now I am not too concerned about WOT. I am planning to drive my car home this weekend which is about a 2 hour drive. The only thing that concerns me is my wideband is ready about 2 points higher than my front o2 sensor. At idle the Wideband Reads about 14.7 and driving it is in that neighborhood too. Here is a log of my dsmlink. Any advice how to drop my air fuel ratio at idle and part throttle? Any advice on the tune is nice too! Thanks guys. The sooner the better the response!
John

 

[cbrfrenzie]

Why would you want your AFRs richer then 14.7:1 for idle and part throttle? You're just wasting gas at that point. When your car is in closed loop, it will do everything it can to keep your AFR's at 14.7:1, which is normal. Its the open loop stuff you have to worry about tuning to your desired AFR, from that point close loop stops to WOT and red line.

 

[1992awdlaser]

At idle and part throttle, known as closed loop, the air/fuel ratio should be around 14.7:1. At full throttle, known as open loop, is when you tune the air/fuel ratio.

The air/fuel estimate is not too accurate in dsmlink so you should not pay attention to it. Hook up your wideband so it can be logged.

Adjust your tps so it reads .63 volts.

You should try to do something to get your coolant and intake temps down.

 

[snowborder714]

And then you can start tuning your fuel trims (easy to do and doesn't take too long):
http://www.jeffgst.com/gmafcalibration2.html

 

[blcknspo0ln]

I really like this writeup too

DSMLink User Group Forums

 

[DaisyTuner]

^ link doesnt work unless registered, and cannot register bc of administrator..

 

[snowborder714]

You cannot register for that forum unless you own DSMlink/ECMlink.

Here is the document though.
http://www.dsmtuners.com/forums/articles-tuning-ecu/262460-basic-dsmlink-tuning-guide.html