Ok, so i have all this moates and xtronics gear, and i *should be able to modify my friends 89 blazer BUT...

I found what i think to be a correct definition file for the 1228062 ecu, but when i look at the stock bin, things look fishy. (like when you look at a truck bin with a camaro definition file, eg random spikes, and some items values are way wierd)

Im using tunerpro, and have searched their files and forums, i searched here as well, and i cant even find the 4 letter code that describes the stock bin despite searching several wiki articles on the subject from various sources.

I mean he doesnt want much done, aside from moving the speed limiter up above 85 or whatever... his stuff is mostly stock.

Ive also searched diyefi's file library, and all i can find is a stock bravada bin, but it looks fishy too... I really dont think i should edit ANYTHING until things look better. Anyone have exp? or a working ecu definition i can borrow?

 

Ever figure this out? I have an '8062 from a Trooper with AKHS (running a 2.8L) and I get nothing when I open it up in tunerpro with the 4e.xdf. I'm tuning with a '7747 now (swapped the Trooper to a 3.4L), but I'd really like to compare to the values in the original bin.

 

Hey, I found my old post googling my new problem. Anyone have luck with this? We gave up but that was almost a decade ago so I'm pretty sure its been well examined by others more knowledgeable than myself here in the meantime.

New project is an 89 trooper. Same ecu. Expecting same problem.... Except I see there's a recent tunerpro update I havent tried.

Thoughts?

 

try Gearhead EFI for the correct bin and xdf/adx definitions. I started tuning my 3.4 blazer with $4E and found the definitions were mostly incomplete, switched over to a '7747 $42/APAB combo and tuned with that fairly easy.


But $4E has been developed pretty well since then, I think you will find what you need.


http://www.gearhead-efi.com/Fuel-Inj...Information-4E

 

I am sort of working through the same thing. Kind of....

I am working with a TBI setup on a 3.4L block in my s15.

I was running a 7747 ECM. In all the adjustments I have made to the bin, I feel I am pretty close, but just not there.

Everyone else who has done the 2.8 to 3.4 swap, and then added TBI, seemed to all have same the response that the 3.4l ran slightly leaner, but then better when they ran 4.3 injectors instead of the 2.8 injectors.

In any case, I decided yesterday to put the 8062 ECM back in the truck and see if I could do a little better on the tuning.

I say this because there isn't a bin written for the 2.8 that is used in the 7747.

One of the things in the 2.8 bins that make me question the use of 7747 bins is the Spark Latency Table differences. I believe those values are based on distributor dimensions, which seem to be different between engine sizes. Then you have differences in what seems to be time delays for combustion gasses to reach the o2 sensor. I've compared 2.8l bins to 4.3l bins to 5.0 bins and all these numbers are different.

Anyways, I've gone through the source code, (I don't really know assembly), and found for example, the 7747 uses a 9 cell table for IAC desired idle speed. The 8062 seems to use something, but I'm not sure what.

If I figure out anything more, I'll post it.

 

If it will help I will try to post the 3F .xdf and a copy of the ASA .bin that ran my 1987 GMC S15 Jimmy.

 

That be cool.

I am also contemplating installing the 4.3 throttle body I have.

As it stands, I've got the 2.8 throttle body with the 4.3l injectors. I've got the Edelbrock long tube headers on it.

Other than that, just the 3.73 rear.

I don't think I'd lose much low end putting the 4.3 throttle body on.

 

Dial in the TPS AE and you will not lose anything, but it will feel alot more punchy at lower throttle.

My 87 had 3.73s from the factory.

With a Crane 272 cammed 3.1 in it you could powerbrake it into a burnout easily.

I had a 350 TBI unit on mine from a G-van on a 1" open center spacer. Used a S10 4.3 aircleaner base, a G20 van lid and filter and a 4.3 S10 air intake duct to replace the much smaller 2.8 stuff.

 

Here are the $3F files I have for a 1987 and maybe 1986 TBI 2.8 S10/S15.

Not much of a fan of how the VE table was done or the TCC lockup and you could feel the flaws in it from the start. The 2.8 TBIs ran with the injectors static above about 3,200 rpm.

 

That is one of the things I noticed right off the bat was the difference in the lockup considering that I had changed the values in the 7747 ecm I was using. I did bump them up to 29mph in the $4f bin.

Did get the 4.3 throttle body installed and took it for a drive. Felt a slight difference over the 2.8, but then again, that could be from the fact that I went from the 7747 ecm back to the 8062 ecm.

Globally, the blm's were rich, but that is probably the result of bumping the fuel pressure up from 11.5 to 12.5 psi.

I made some slight changes to the spark table in a couple of areas due to knock and then tweaked the ve tables a little.

I don't know if I'm making this more complicated than necessary, but I've found that WinALDL seems to be better for looking at the wide/narrow tables over the TunerProRT.

 

There should be history tables in the .adx for Tunerpro that accomplish the same thing WinALDL does. If not, they are easy to build and taylor to match you VE tables, or can be structured to match WinALDL's tables.

 

Unless I missed something, I like the way that Winaldl gives the option of saving each table into a nice layout of text format.

It makes looking at more than one data run a lot easier.

I did some driving yesterday that gave me a lot of good numbers all over the board. Total 42 miles in 3 parts.

While Winaldl doesn't show a lot of the extra data that Tunerpro does, it certainly made it easier for me to copy/paste the specific sections from the saved charts into one and do some averaging.

Sounds like more work than necessary, probably, but I did not mind that.

 

you can copy/paste all or part of a history table into excel or open office too

 

Yeah.

I do like the way the text document is made for each category in winaldl is created though.

Oh, and the wide/narrow corrections there too.

 

Its up to you what you want to do, I'm just stating that TP has the same features.


Same with wide/narrow deviation/corrections as well.

 

I remember seeing the deviations in TP, but not the corrections.

Where is that?

 

It is currently not in the $4E .adx, but can be added by editing the definition. Its in another definition I have worked with. If you wanted to add that its relatively easy, just plug the conversion in and use whatever sensor data you want, then build the histogram to match the range you want.

 

Oh ok,

Will look into that in a bit.