My car needs a custom chip so I am going to get to work on that. Just wondering who is using winbin and who is using tunercat. If you are using winbin what ECU file are you using? I could not find one.

 

I too have been unable to find a correct ECU for WinBin. If you find one can you let me know?

Thanks
Bill

 

Your best bet is to switch out the 8746 ECM and use a 7747 ECM. Hopefully my edited ECU file (almost complete)will work in WinBin on your computer. Some of my friends just can't get it to work, but it works fine for me.

Download the file and change the extension to .ecu

 

Hey captain.

Thanks for the reply. Is this an ECU file originally from a 747 that you have modified to work with the 746 computer or is this a 747 ECU designed to work with a 747 computer?

Bill

 

V8 Astro,
Do you know if that ECM supports 8192 baud ALDL? Also, does it report things like EGR duty cycle, injector pulse width and other things? I am considering switching ECMs, because 160 baud mode is virtually useless for tweaking certain things...my ECM doesn't even tell my injector pulse width, not even in 160 mode.

Any idea?

 

It will only work for the 747 ECM. Sorry, I don't know where to find an 8746 ECU file...

No, no and no . The 747 is VERY simple. Don't be concerned with the 160 baud ALDL rate. The speed at which the ECM sends data to the ALDL will not in any way affect your ability to tune. I've been working on my setup for some time now and it's the same game with the 747 ECM (160 baud) and the 730 ECM (8192 baud). You don't really NEED to know injector pulse width anyway. If you really want go to www.diy-efi.org and look for the instructions to build an LCD pulse width meter.

WinALDL is a VERY good program. It'll do everything you need it to.

 

I think it matters very much, the speed of the ALDL connection. For example, during a WOT run in 2nd gear, 160 mode reports just several O2 data points, whereas 8192 would have a whole mess of them. And it is important to me that I see everything that's going on, not just assume that, between points A and B, everything is peachy. That doesn't cut it for me.
I scanned a 91 2500 Suburban and its ECM supported 8192 and all that extra crap that my 93 Caprice's ECM does NOT report. I was quite jealous.

And I disagree - I do need to know injector pulse width. In fact, I need to know it right now. I am in the middle of diagnosing a weak fuel pump and I need to know IF the engine is going lean (160 isn't enough resolution to read O2 voltages during a WOT blast), and for what reason.

All I know is, I have done so many data captures with my XP240 at 160 baud, and the stuff it tells me is very limited by the data rate. At the top of my rpm range, the L05 has been falling off, sometimes push-pulling (power coming back and going out again). This is why I am thinking fuel pump. The thing is, I have taken data captures when this has happened, and, if I am lucky, I might catch ONE cell with O2 voltages in the 0.600V range, but maybe not. I need the resolution of 8192.

I agree that there are various work-arounds to each of my qualms with the 160 baud rate (like DVM on O2, vacuum pump on MAP sensor to test functionality - 160 is too slow for me), but I want it all in the ALDL.

So there is no ECM that I can swap to that will give me what I want?

 

no

 

So, to use Winbin you have to switch to the 7747 ECM.

What about tunercat, would to swap also be necessary?

 

Why can't I run that 91 truck ECM with my Calpak? Or even just do my best to duplicate my EPROM into the 91 truck's EPROM??

Something doesn't seem right...

 

You don't HAVE to switch. Basically, you can find ANYTHING you want for the 7747 ECM, most of it is free as well.

If my .ecu file works on your computer then you will be able to about 3 times as much with that than Tunercat. Tunercat is nice if you like big flashy buttons and graphs. Which are mildly helpful, considering it's $80 price tag.

Because your CALPAK and PROM are for a different ECM. The PROM chip contains the calibration as well as the program used to run the entire fuel injection system. They're not interchangable.

 

I have a 92 fbird with tbi Would that be a 747. And what is the bin file. And does anyone have one for this car so i can use it to practice with (figure out what going on). I have win bin Just have to get a programmer and a couple chips. Also been lokking at some programmers on ebay will anyone work or Do i have to use the ones listed on the thirdgen page.

 

i dont see why you care so much what the ecm reports at WOT most of it is crap anyways

besides, the 7747 can do everything you want and more you oughta look around to see whats available for it thats freeware, like lockers, etc

 

but on thesame note, i dont think its neccessary or wise to swap to a 7747 with the hack out for the 746 you are best off just sticking with that its actually a better setup being that it has an IAT

 

and the highway mode already working.

 

And now for the ecu file
Check out ftp://ftp.diy-efi.org/incoming
Look for 8746jonprevost.ecu
It's probably what you're looking for.

There is now no reason to go to the 7747 unless you're crazy like that.

 

Everyone needs to jump on this one, JP has been working non stop to get this done asap. I think he has done a fabulous job in record time, six months ain't so bad, negleting school and family to get us tbi'ers the info we need to keep our cars running flawlessly. A big thanks to Jon, THANKS JON.

No kidding Jon, you have helped all of us out tremendously. Thank you. :hail:

 

I get to make love to Jon first, I called it.

 

Hum... I'll just simply send him my thanks!

THANKS JON!!!

Later,
-Mike

 

Hey guys, I don't know if I'm missing something or overlooking it but I can't find the 8746jonprevost.ecu on the ftp site?

 

Try again. Some smart guy didn't copy the file.....they moved it

 

All right got it now, that's a beautiful thing. Thanks a lot for all this work your doin for us TBIers with this ecu file and the aldltobin file earlier, that's rock solid man.

 

The newer PCMs (ie like a 91 MY BBC AUTO Truck, and are TBI)support the faster ALDL.
Just find a hac to that and recal as necessary.

But, the VSS signal is very different, dunno what you'd have to do there, maybe there is an option flag to use a 2K PPM sensor.

The 8746, and 7747 are the same printed circuit board, and the 8746 just uses the extra input for IAT.

 

Do you think it would be able to get a 7747 to accept an IAT?

 

Yes, but as I figure you need to have the correct rom, the 7747 differ in that sence. Once you go romless and have access to roms of other c3 ecm's then they're all the same or at least they should be.