New to forum with fresh tbi install.

[damanx]

I guess I should at least put the 4.3 chip back in and make a run with that to see the difference.

But those blm and int numbers ok?

I suppose I should figure out which knock sensor I should be using also.

Oh, the timing is set to 10 btdc per the 2.8l donor truck label.

[EagleMark]

Base timing is another setting in bin file, it needs to match where distributor is set. Most TBI motors are 0...

But those blm and int numbers ok?

There in the ball park. INT is Short Term Fuel trim and fast. BLM is Long Term Fuel Trim and slow. Your INT is making some drastic corrections, watch it jump to 157ish, I think that may be max, that setting is also in the bin.

The ADX and XDF in the info thread was very basic... I had worked on them and not uploaded newer copies, go get the new ones, lots more info in them.
$4E-1228062-V1

These files are all open to customize...
http://www.gearhead-efi.com/Fuel-Inj...es-in-TunerPro
http://www.gearhead-efi.com/Fuel-Inj...unerPro-How-To!

[damanx]

This is where the prom reader would come in handy since I've not found the ACHT bin yet.

What makes me wonder is the 0 degree base timing for the distributor that I keep reading about, yet the label for the donor truck shows 10 degrees.

So I am a little confused on that issue.

Got those files, like the night dash there!

I think I might have the wrong knock sensor installed. Should I get the 3.4l for that engine or use the 2.8l for that ESC?

[EagleMark]

If you had the bin or any bin for that engine should be the same. Open it and look for Base timing or? Things can be named different, some do not have all, have to read the disassembly and enter new paremters.

That said, I think a 1227747 ECM would plug into your harness, I've done all the work on those files, plenty of bins...

[damanx]

Is there a way to read the bin file from the prom via the serial data stream? If you have to have a prom reader for that, then I am stuck until I get one, or, I find that bin online untouched.

Can it be done through TunerPro while connected through just the serial data stream?

I might look into the 7727 ecm, but I need to get the basics down first.

Do you have any recommendations for bins to look for that ecm? I will be going to scrap yard tomorrow for a couple of parts. Might as well look for that ecm.

[EagleMark]

No way to read a chip without a burner/reader.

I'll look for a bin for you. Why are you stuck on... what bin?

[damanx]

It's ACHT.

I am kind of stuck on that one because it's the bin that came in the ECm from the donor 2.8l along with everything else.

Can you recommend a 1227727 bin that would work for me, or am I correct in assuming that it won't matter, they will all require some tuning to a degree?

[EagleMark]

You got a 3.4L engine, 4.3l injectors and a 2.8L Throttle body. There is no starter chip. Pick a bin, any bin, set up the constants and tune it!

Me? I start all these off the wall combinations with ASDU for Auto and ASDX for Manual in a 1227747. Have done 4.3l V6 chevy, 5.0L V8 Chevy, 5.7L V8 Chevy, 383 V8 Chevy, 400 V8 Chevy, 454 V8 Chevy, 304 V8 IH, 345 V8 IH, 392 V8 IH, 154 I4 IH, 4.0L I6 Jeep, Whatever a Toyotas Landcruiser I6, 300 I6 Ford... etc... and doing a 327 Rambler next week.

I even put Fuel Injection on my old computer!

[damanx]

Nice!

Well, for the time being, until I get something to actually communicate with the chip, I've got to go with what is working so far.

Will tuning be much easier for the 7747 ecm? I know I've seen quite a few of them at the scrap yard, I just don't want to bite off more than I can chew at the moment while still having a running truck.

Oh, the 3.4l knock sensor is installed if that means anything.

I have two others, one for a 305 and the other for I don't know.

[EagleMark]

I'm not sure anyone has cracked all the differences in ESC modules and swapping with knock sensors? I stick with what works, knock sensor and ESC from same system, best if it is from same or similar cubic inch. We know knock sensors are different and are tuned to cubic inch.

The 1227747 is basically same ECM as what you have. Except it has 2 chips, make sure you get one from a V6, the small chip is NETRES, I don't think your ECM NETRES is removable. The only reason it is easier is it has been used and hacked more then others. The ADX and XDF are much more complete. That said for a stock motor I don't think you'll need all that is there.

Open the $42 XDF and ADX and see what's there.

As an experiment when you get chip burner you could burn a $42 bin and see if it works in your ECM? I've been told it works, but never tried?

[EagleMark]

Here's what I would do with your 1228062 ECM with $4E.

There is no 3.4L bin for it, only 2.8 and 4.3. Since you have 4.3 injectors I would use the 4.3L bin, newest one available for 4.3L Auto is ATBA. Change the engine displacement, turn off EGR, run 3.4 knock sensor and module and start tuning.

[CDeeZ]

Nice project. Always liked the 'dimes'. Especially when they're engine swapped.

[damanx]

Here's what I would do with your 1228062 ECM with $4E.

There is no 3.4L bin for it, only 2.8 and 4.3. Since you have 4.3 injectors I would use the 4.3L bin, newest one available for 4.3L Auto is ATBA. Change the engine displacement, turn off EGR, run 3.4 knock sensor and module and start tuning.

That sounds like a plan.

I happened to notice that the knock increase occurs during acceleration from the 25-45 range.

My transmission seems to be slipping through 3rd, but it's been doing that for a bit now, which is next project.

[EagleMark]

Don't you have distributor set to 10? Well there's an extra 10 degrees and your knock... and what chip? For what engine? What timing?

[damanx]

I put the 2.8l chip back in for the drive home from work this morning.

I just got up a little bit ago and decided to check a few things. I'm not sure why, but the timing was off, and I am not sure why other than I think that when I initially set the timing a while back, (before finding out that bins have different base timing programmed in), I believe I might have set the timing with the aldl connector grounded, which I understand is "field service mode" and that causes the base timing to advance, but I don't know.

Anyways, I followed the procedure on the emissions label for this ecm and the matching 2.8l prom and have the timing set to 10 degrees.

I suppose it would help to figure this stuff out easier if I make sure I have set things properly before hand.

Here are pictures of the label from the truck that I pulled all this ecm/tbi stuff off of:




Going to take for a test run and will post back in a bit.