Dsmlink Log help, new to tuning

[eclipsetuner_21]

I still have to calibrate the gm maf in dsmlink, but could someone give me some suggestions and what to do?? I am running 15psi.

 

[snowborder714]

You need to calibrate your TPS to read .63:
dsmlinktpsadjustment [ECMTuning - wiki]

I would also go through and do your fuel trim calibration. This will calibrate your 50, 150, and 250 Hz airflow sliders. This can also aid in setting your 400 Hz slider, but doing a pull will give you more to work with.
http://www.jeffgst.com/gmafcalibration2.html

Here's how to calculate the 400 - 2400 Hz airflow sliders. To do this, you need to log just a 3rd gear pull from 1500 or 2000 RPM to redline. Try and get as low RPM's as you can to start off with. Then use the calculation to figure out the points. If you want to post a 3rd gear pull, I can help you set those sliders. You have this really easy because you have a MAP sensor

I've never seen anyone have positive fuel settings (as you do from 5500 RPM to 8000). Did you use some method/calculation to adjust your fuel sliders? I would reset them all to zero for now, especially until you get a wideband. You can start adjusting these after you get everything else set.

And are you sure you're only running 15 psi? Your MAP sensor is showing that you're running 27+ psi.

 

[eclipsetuner_21]

I am using a gm 2bar map because I got it for free, I don't believe it is reading correctly because my manual boost gauge is saying 15psi. I am going to zero out my fuel trims and turn the boost down to 11psi, and hook the map sensors ground to an ecu ground instead of chasis ground. Then I will calibrate and then post a 3rd gear pull

 

[1992awdlaser]

The map sensor has to be hooked up to a sensor ground. The 2bar map sensor isn't going to read much boost. 1bar is for atmospheric pressure. So that map sensor will only be able to read 1bar of boost.

 

[eclipsetuner_21]

thankyou 1992awdlaser, I have been meaning to correct that since you did the writeup on the aem one of yours, got the 2bar for free and I know it is only good for 1 bar thats why I will upgrade soon.... I just would like to get it running really on a base 11-12psi and get the most out it and then go up....

 

[eclipsetuner_21]

Ok here is the third gear pull, had to stop around 6grand because there was a cop , the gmmap is not reading correctly

 

[snowborder714]

Make sure you go through and do your idle, rev, and cruise tuning (per the 2nd link I posted earlier).

I could go through and calculate all of the values, but it will be so much easier with a working MAP sensor. I would just focus on getting the sensor to read correctly.

 

[1992awdlaser]

I could go through and calculate all of the values, but it will be so much easier with a working MAP sensor. I would just focus on getting the sensor to read correctly.

He won't be able to get it to read correctly. Let me try to explain.

He has a 2bar map like he mentioned. Dsmlink thinks he is logging a 3bar map. The 2bar is seeing the max boost that it can read. Because of that it is sending out the max voltage to the ecu input. Dsmlink interprets this as the max voltage from a 3bar sensor. So dsmlink shows a max map reading of max boost from a 3bar. Tom or Dave would have to make an update where you can log a 2bar value.

 

[snowborder714]

Ah, ok. Now, will it never work, or would it be a possibility if he kept his boost under that 1 bar limit?

 

[1992awdlaser]

Ah, ok. Now, will it never work, or would it be a possibility if he kept his boost under that 1 bar limit?

It still wouldn't work. Dsmlink should display twice of what the map is acttually reading. I don't know if it will be exactly twice though. The 3bar sensor can only read 2bar. Since both work on the same voltage range the 3bar should read twice the value in dsmlink than what the 2bar is actually seeing. Let's say they are both sending half the voltage they can to the ecu. The 2bar map sensor would display(if it could be logged) .5bar(half of what it can read). And the 3bar would display 1bar(half of what it can read).

 

[snowborder714]

Thanks Pat!