handyman how was it running before it was modified? was the check engine light on or anything. when you are hooked to it datalog and record and save a file then post the file.
handyman how was it running before it was modified? was the check engine light on or anything. when you are hooked to it datalog and record and save a file then post the file.
Last edited by ony; 09-06-2017 at 03:50 PM.
Hey Anthony,
When I first started the motor, it was a fresh rebuild with all the internal engine mods. It ran just fine with the 4288 ECM. Then, something happened when I attached the ECM-to-PCM adapter I made as a means to hook up the 8625. I went the adapter route because I wanted to have an easy escape route to go back to the 4288 in the event I screwed up tuning the 8625. However, since the motor wouldn't start with the 8625, I decided to go back to using the 4288. Unfortunately, that is when all the problems with rough idle, struggling to stay running, and shutdowns/dying surfaced. These problems even persisted when I inserted the PROMs you sent.
Interestingly enough, for some reason, I don't get any check engine lights unless I disconnect a sensor.
lastly, I have not done any data logging because: (1) I am still learning how to get my computer to sync with the AutoProm, (2) then connect via the ALDL. Besides that, the motor won't stay running long enough to attempt any data logging.
If it isn't one thing, it is another...
Last edited by 57 Handyman; 09-09-2017 at 11:29 PM.
I made a adapter and got 1 wire wrong and blowed the modgul in the dist. truck wouldn't start with the 288 reinstalled.it is a possiblityyou may have damaged the modgule most of the time the vehecele don't run at all but it might run badly.if there is a orielys or auto zone over they can check it. tell them to load it heavy when its checked. if it is bad or going bad it wont turn on the cel light. all the red underlines I must not be speling very good this morning.
LOL...wow, before I installed the adapter, I checked and rechecked that each of the wires was attached to the correct pin in the schematics I had. That is not to say, the schematics were 100% correct. I also did continuity checks with a VOM.
Regarding the Ignition Contol Module, I had considered it as a possible source of problem but had not done a swap out because the rough idle problems disappeared and the engine ran fine at higher RPMs. Would this be the situation, and make sense, if the ICM was bad or going bad?
Buddrow,
I got the 7747 ECM but it didn't come with a PROM. So, on a whim, I stuck one of the PROMs that Anthony had sent me some time ago for the 4288. This one was a BCC BARL and had been modified for no EGR. Don't know if this was/is an unadvised move. Anyway, the engine started up fine and ran for as long as I would let it run. I turned off the ignition and did several restarts. In park, the idle is a bit on the high side (11-1300 rpm) but the motor isn't struggling or slows down and dies.
I did notice the Check Engine Light faintly flickering but it doesn't display any codes when I turn off the ignition and place the key in ON. I connected a SNAP ON Scanner but am not able to get any readings nor can I get the scanner to display any live data. So, it appears there is something amiss with the ALDL and codes when the 7747 is installed with the 4288 PROM.
Because the 7747 with the 4288 PROM resulted in the engine running for an extended period, I was hoping to attempt data logging. However, this issue with the ALDL might not enable me to do that.
Since I have the MOATES AutoProm, I was thinking of grabbing a 7747 BIN that closely matches my 4.3L TBI with 700r4 and burning a PROM. The one that comes close is the [AKDX 87 G-M-R-V Van 4.3TBI 700r4] that I found in the thread...
http://www.gearhead-efi.com/Fuel-Inj...Information-42
One question that I have is will I have to load appropriate sets of .xdf and .adx files into TunerPro in order to do the burn? If yes, which ones would I need/use?
Once again, one step forward, one step backward....
Last edited by 57 Handyman; 09-11-2017 at 01:30 AM.
that is a good plan the747 was in limp mode.these should work.
Thanks Anthony, after I sent the response, I found those two files with the BIN I downloaded. Now, I need to look/find locally or order some PROMs. I don't have access to the device to erase the PROMs that I have. I also plan to send back to you both PROMs and the ALDL cable shortly.
As I mentioned, for some reason, the shop's SNAP ON scanner was not able to grab any data or codes. I am hoping that isn't another problem I have to resolve before I can do data logging.
Have a good week!
This seems to be an important piece of the puzzle. Ran fine with '288 initially then like you said the problems came after the '8625. In one of your post, I noticed you said the E-fan kicked on 200dF. The data log you posted, yeah rich and engine temp never got over 140dF. Anyway, I have a few '747s that you can try out. The only V6 one I have is missing the PROM chip so I need to make one. I'll prolly burn the one you posted in one your threads. I can also bring my antiquated laptop and see if there's anything that seems amiss. Just let me know when the next time you're gonna go play!Originally Posted by 57 Handyman
Hey Stew,
I accept your offer. I should be at the hobby shop Friday afternoon...drop me a text.
Blaine
It was a great pleasure to put a face to a screen name!!! Don't want to steal your thunder...anyhoo drove home with 2732A in hand, (btw thanx) stuck it in my burner, did a blank check, loaded AKDX.bin, burned and verified. Next test is to stick it in my home brewed UV eraser and try it again.
Last edited by stew86MCSS396; 11-27-2017 at 06:05 AM.
how did you homebrew the eraser? I've been looking for a uv source.
Please, please, please read about the inherent dangers when dealing with UV light!!! Purchased 4W UV-C G4T5 bulb and this florescent utility light. Stuffed it in a gutted L69 ECM case and found a suitable 6v power supply (leftover from an old cell phone charger). Drilled a hole the same size as the window on the EPROM. I'll just set the EPROM over the hole, plug the cell phone charger into a power strip, turn light on w/ power strip switch and walk away for 30 minutes. Crude but it works. Once you start using EEPROMs, you'll never go back!!!
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