[Gmecm] '7747: Back to tuning after 4-year hiatus

[Chris Reynolds]

It comes with the package.  Even has its own dataloging and analysis software.  Really nice setup.

Arby <aoturneriii at tds.net> wrote: Hi Craig,

Do you have any plans to make a data logging cable that goes straight to a 
USB port for the Dynamic EFI ECM.

Thank you,
Arby


----- Original Message ----- 
From: "Craig Moates" 
To: 
Sent: Thursday, June 29, 2006 5:41 PM
Subject: Re: [Gmecm] '7747: Back to tuning after 4-year hiatus


> John,
>
> Have you seen the new EBL and UltimateTBI stuff from here: 
> http://www.dynamicefi.com/
> Real nice, they put some good work into the development. High-speed data, 
> imbedded functionality, and a new code base to deal with
> pesky TBI-specific issues of the 747.
>
> Best regards,
> Craig Moates
>
>
>
> ----- Original Message -----
> From: 
> To: 
> Sent: Thursday, June 29, 2006 2:34 PM
> Subject: [Gmecm] '7747: Back to tuning after 4-year hiatus
>
>
>> Hello all,
>>
>> I have a 4.2L powered Jeep on which I installed a '7747 controlled TBI 
>> system in 2001 - 2002.  At that time, I went through
> several iterations of programs eventually making the Jeep run consistently 
> "fair".  Due to other things going on in life and career,
> I was content with "fair" ... but now I want to get back into the code and 
> make it run "good".
>>
>> Some background:  I still have my Pocket Programmer II, EPROM eraser, 
>> Auto X-Ray, and a WinALDL cable (but I've never actually run
> WinALDL) ... and I see that WinBin and TunerCat are still available.  I 
> still have my old ECU files and a history of my BIN files.
> The Jeep is now a trail rig with limited on-road operation.  Its a 4.2L 
> with stock intake manifold and headers.  I am running ECU
> controlled timing.  The cam is a little more than stock ... a Crower RV or 
> off-road cam (I'm sure I can find cam data if necessary).
>>
>> Because of some changes that I have made to this Jeep during my hiatus 
>> (making it a little closer to mechanically stock), I
> believe I would like to start over again with my program.  My first 
> thought is to start with off-the-shelf Howell code.  Is that
> code available from anyone?  Barring that, can anyone recommend a good 
> place to start (again).  Perhaps someone has a good running
> Jeep 4.2L code that they can share?
>>
>> My major issues, currently, are:
>> 1.  An unsteady idle ... particularly when its cool and cold outside.  I 
>> know that, because of a big Clifford intake manifold that
> I used to run, I fiddled with the IAC time delays and accelerator pump 
> constants (and maybe some other stuff).
>> 2.  It seems down on power compared to some carbureted Jeeps I've been 
>> in.
>> 3.  Runs rich across the board (not drastically so), but is very rich in 
>> some areas (RPM and load).
>>
>> Bottom line, I'm can't remember what all I did to the my code in the past 
>> in deviating from some start point (probably a Howell
> code); and I've made some mechanical modifications to the driveline.  I'd 
> like to start again with a known and solid code.
>>
>> Thanks in advance,
>> John
>>
>>
>>
>> _______________________________________________
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>> Gmecm at diy-efi.org
>> http://lists.diy-efi.org/mailman/listinfo/gmecm
>>
>>
>>
>
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