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DFI and ECMDiscuss all aspects of DFI (Digital Fuel Injection), ECMs (Electronic Control Module), scanners, and diagnostic equipment. Fine tune your Third Gen computer system for top performance.
Trying to prep for my ALDL cables arrival I've installed both TunerPro RT & WinALDL on a spare laptop. I'm only interested in datalogging w/ the 1228746 for diagnostic reasons. All problem specific situations will likely have an individual thread, but this is where I'll start this datalogging journey! Any information you're willing to share would be appreciated. Feel free to post links to other software one can use, tips & tricks, links to other useful threads, etc.
Last edited by 92RS-HeritageEd; Mar 28, 2019 at 08:37 PM.
Things I have are the AXKT.bin file, 61.adx file, and $61.xdf file. Loaded them up in TunerPro RT, I think all went well but i'm also not sure. I just have this long list on the left with Scalars, Flags, and Tables. Just a blank shaded grey work space off to the side. I guess it's Plug N Play ready.
Also did a test launch of WinALDL, and received a COM1 error, Clicked ok, it loaded a simple data table. I think it's ready for me to assign a COM port within usable range to my cable and get to logging.
What software title do you find with the best GUI that's reasonably user friendly too?
Last edited by 92RS-HeritageEd; Jun 8, 2019 at 08:03 AM.
Reason: Uploaded $61 XDF
Logging went off without issues in WinALDL. Can't get TunerPro RT to connect to the ECM. I keep clicking the cord icon but the statuses at the bottom never change.
Have you tried to put the ecm in the 10k mode?
I can’t recall if this ecm needs to have it 10k to start dataflow.
You can try different com ports under tools/tunerpro preferences
no need to load a bin unless you plan on modifying it to be burned. Or want to look at its data but to datalog you only need the $61 adx.
SUCCESS: I've connected to the ECM in TunerPro RT. I had to change a setting related to the cable, I also activated the 10K mode so idk which made it work but it worked! The screenshot below is after the log at KeyOnEngineOff
I have a data-log file I'd like reviewed... but I can't upload a .xdl file
You might want to throw in a new o2 it seems lazy.
It can’t hurt just as part of a tuneup.
what does your service manual say about code 33.
It shows in your adx too.
When I drove it yesterday the CEL came on for a millisecond before she stalled out. The codes will only store after 20 sec or so under the conditions that led to the code iirc. Tried to force it to come back during my laps today but it didn't...
Even though your status shows closed loop early at 200f the o2 was heated up and started to swing.
Are you getting both map codes stored in the ecm ?
I think you might have a vacuum leak the idle is high and the iac is commanded in trying to lower down the rpm. Does the rpm ever come down to 650 range ?
The high and low codes could be caused by the surging.
No, doesn't settle at 650 rpm's. I was able to get it to idle at 950ish by adjusting the idle screw while it was running at operating temp. The MAP & TPS voltage dropped some too and the surging smoothed out. This was like the last 2 min of the log. No codes are stored but I'm gong to disconnect the battery for a few and log again in the morning.
The iac counts need to be around 20 warm. I did notice the tps going from a hair over 1.0 to .81 at the end .
you might want to replace the tb base gasket or check for leaks there first.
Last edited by Tuned Performance; Apr 5, 2019 at 10:41 AM.
New find, while running Battery Voltage dropped to 9V, what in gods name can take a battery from 12V+ down to 9V and back up within seconds? Even caught a Low Battery indicator in TunerPro, but nothing on the dash... No accessories were on and the battery is tested good.
Haven't had the alternator tested, this time I will swap it for a known good unit and log again. *IF "voltage is not battery direct but fuel pump voltage on pin b2" how would we know, is there a TunerPro glossary?
Went to change out alternator and found the connector had been replaced. What's there is a 4-wire connector w/ 2 wires were cut. Should that work like a 2-wire or should I head to the jy to grab a 2-wire?
EDIT: Checked my other 92 and it has a 2-wire connector w/ wires coming from the center, I'm just going to swap the alternator and see how it goes.
Last edited by 92RS-HeritageEd; Apr 6, 2019 at 09:15 AM.
Two wires is correct. A large red wire on the S terminal that goes to the starter. Then a regular sized brown wire going to the F terminal. The terminal positions are molded into the body of the connector.
After the alternator change... I'm starting to think my likely aftermarket fuel injectors are dumping more fuel than the minimum idle set requires. What does the data say to you?
Varies, last glimpse blm was up to 150 and int was 151 at one point
*Note the drop in RPM's as I cycle through gears, it completely stalled once. Near the last few min it looked like MAP and TPS voltage was in line, I shifted in reverse boom code 33 map high in tunerpro, no CEL. Log ended.
Last edited by 92RS-HeritageEd; Apr 6, 2019 at 07:15 PM.
UPDATE: For the pure HELL of it I grabbed a spare ECM w/ stock AXKT PROM and tried it. I was shocked at the difference, the fuel coming from the injectors looked different, like an ultra fine mist cone spray and not the extremely visible cone spray that led me to believe the injectors were dumping fuel. I readjusted the idle screw in live op allowing the ECM to adjust accordingly got idle to 850-900 rpm's in park. While the log below was created in CL, It seems I achieved MAP voltage @ idle of 1-1.5V and TPS voltage @.94 defined as within spec in my gmsm. Most importantly, no surging & no stalling while cycling gears!
Not to kill my excitement, but we'll see if it runs the same come morning
It didn't, It hurt so bad I connected the battery in my other 92RS and one crank, flawless ignition and idle... and it's her 1st start of the season. I sat listened to a few tunes and watched the log, I noticed some differences in MAP and TPS voltage. Anything in the previously shared logs compared to the one below stand out?
How can I see timing curves and graphs in TunerProRT like you'd see on a traditional scanner like a Snap-On or is there another software for the laptop?
To see the timing curve view the bin. More than likely axkt.
btw 33 can be reprogrammed out of the prom but I don’t think it will help your running issue.
Sorry about the title of this datalog I was a bit excited to complete a few laps without loosing fuel pressure! I don't know if the O2 voltage swing is normal, also not sure what a 121 BLM is lowest I've seen is 128, but normally around 140-150...
