Datalogging with RT?

CManT1914

New Member

Feb 5, 2004

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Killeen, Texas

Aug 25, 2005

#1

• Aug 25, 2005

• #1

I got the twEECer hooked up and the car runs, now I need to know: How do I datalog using the twEECer?

Oh yea, the instructions that came with it suck. They don't talk about datalogging.

 

Zero Signal

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Feb 24, 2003

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Tucson, AZ

Aug 25, 2005

#2

• Aug 25, 2005

• #2

First you need to set your payload. In CalEdit, go to the Utilities tab and check everything you want to log on the right then click the Payload button. Name it whatever you want. And burn the tune to the tweecer with accesory on.

If you have a laptop, open up CalCon. Plug the USB cable into the laptop. Turn the car on and hit the start datalogging button (red one). Then check the record button to make the file.

 

CManT1914

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Feb 5, 2004

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Killeen, Texas

Aug 25, 2005

#3

• Aug 25, 2005

• #3

Anybody wanna tell me why the stang idles better with a stock tune than with my tweecer tune? All I did was change MAF tranfer, injector slopes, and idle speed. Stock or tweecer tune, it idles at 900, but with the tweecer tune, it surges HORRIBLY!! The stock tune it's not so bad.

 

Rootus

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Feb 8, 2003

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#4

• Aug 25, 2005

• #4

CManT1914 said:

Anybody wanna tell me why the stang idles better with a stock tune than with my tweecer tune? All I did was change MAF tranfer, injector slopes, and idle speed. Stock or tweecer tune, it idles at 900, but with the tweecer tune, it surges HORRIBLY!! The stock tune it's not so bad.

Click to expand...

Because something is not right . Double check the MAF curve, and make sure you didn't get the injector slopes backwards (assuming you are using different values for each). Low is not really low.

 

Zero Signal

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Feb 24, 2003

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#5

• Aug 25, 2005

• #5

Make sure you have CBAZA strategy selected!! I made that mistake when i fired it up the first time. Or you can select 'read eec' and burn the stock eec to the tweecer and go from there.

 

CManT1914

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#6

• Aug 25, 2005

• #6

Rootus said:

Because something is not right . Double check the MAF curve, and make sure you didn't get the injector slopes backwards (assuming you are using different values for each). Low is not really low.

Click to expand...

Okay, something is seriously f***ed up with my car. I got the right MAF curve in there, the injector slope high is set to 30, low is set to 36.5, and the car still runs like sh**. I'm beginning to think there is something else wrong with it. My front seal on my lower plenum is leaking oil. Could it be a vacuum leak as well? I have heard that a vacuum leak will cause one to run real rich too. WTF is up?!?!

John, I'm using the CBAZA strategy, and i started with a stock T4M0 tune, all I changed was the injector slopes, maf transfer, and idle speeds.

 

Zero Signal

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#7

• Aug 25, 2005

• #7

Did you clean the protective coating from the contacts on the eec?

 

Zero Signal

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#8

• Aug 25, 2005

• #8

Start with a stock tune burned to the chip, if it's still screwed up it's not the tune. Change one thing at a time.

 

Rootus

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Aug 25, 2005

#9

• Aug 25, 2005

• #9

I've not been watching your threads closely, but just to make sure -- are you reading the TwEECer again after you flash a new tune to make sure it took what you wanted? The EEC does not take nice round numbers like 30 and 36.5, etc ... so it'll make the numbers fit to something it likes, and sometimes it screws that up. So I'd double check that the EEC really has the program you think you gave it.

If it idles fine with the stock tune, you can probably rule out a vacuum leak or something else mechanical.

 

Zero Signal

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#10

• Aug 25, 2005

• #10

So, does it idle ok with the knob in the OFF position? All the way clockwise

 

CManT1914

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Killeen, Texas

Aug 25, 2005

#11

• Aug 25, 2005

• #11

Okay, here's the rundown.

I am using a T4M0 base tune, CBAZA strategy, and the EEC reads the tweecer just fine now.

The only things I have changed are the idle speeds (900), injector slopes (high, 30/low 36.5), and the MAF transfer (Pro-M30). Now the EEC IS changing the values, it changed the idle to 896, whatever. It also changed the injector slopes to 29.998 and 36.499 or so.

It drives fine, but it's just running DAMN rich. I fumigated the entire garage (this is at my dad's shop, it holds 8 vehicles, lol).

Oh, for sh**s and grins, I turned off EGR and smog, but didn't drive it after that. That's all I can think of for now.

 

Grn92LX

Fidanza Man!

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Jan 14, 2001

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Aug 25, 2005

#12

• Aug 25, 2005

• #12

After reading the million tweecer threads you made today, thanks for reassuring me why I chose a PMS instead Looks like you have to be Einstein to use this thing. Once you get the hang of it, the car will take a huge turn for the better!

 

WhiteDevil

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Feb 4, 2003

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Aug 25, 2005

#13

• Aug 25, 2005

• #13

CManT1914 said:

Okay, here's the rundown.

I am using a T4M0 base tune, CBAZA strategy, and the EEC reads the tweecer just fine now.

The only things I have changed are the idle speeds (900), injector slopes (high, 30/low 36.5), and the MAF transfer (Pro-M30). Now the EEC IS changing the values, it changed the idle to 896, whatever. It also changed the injector slopes to 29.998 and 36.499 or so.

It drives fine, but it's just running DAMN rich. I fumigated the entire garage (this is at my dad's shop, it holds 8 vehicles, lol).

Oh, for sh**s and grins, I turned off EGR and smog, but didn't drive it after that. That's all I can think of for now.

Click to expand...

If your sure its running damn rich than maybe try playing with the injecor slopes, just slowly but surely and see how it helps. The number are not a mathematical exact equasion. Even though you have 30# injectors it doesnt mean it will run perfectly at a 30# setting.

 

CManT1914

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Feb 5, 2004

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Killeen, Texas

Aug 25, 2005

#14

• Aug 25, 2005

• #14

I'll see if I can datalog a few runs tomorrow. What would I adjust my injector slopes to? Maybe I could try adjusting the maf curve too? I could lean it out by 5% at a time.