camaroyoungster

I am having some trouble reading the live data of the ecm through an autoprom while trying to diagnose an idling problem. Car was converted to DIS using a 7730 ecm and an $A1 chip (BFAW). I don't know if it is the ECM that is bad or if there is some wiring issues for the serial port. I attached a video of what I am seeing. I have set the Autoprom to pass through mode and 8120 baud. Any help is appreciated.

Thanks,

Drew

camaroyoungster

camaroyoungster

Still having problems with this. I don't know if anybody has experienced this before?

Thanks,

Drew

GeneralDisorder

iTrader: (1)

You try the files here?

http://www.gearhead-efi.com/Fuel-Inj...Information-A1

camaroyoungster

I have attached the .bin I am using as well as the wiring diagram I used to wire it up. If that helps.

Drew

RBob

iTrader: (1)

$A1 sends various packets on a regular basis. This makes it difficult to connect to and get the ECM to stream the normal ALDL data. IIRC, need to tell the ECM to shut up, then request the proper data stream.

RBob.

camaroyoungster

Do you know how I can do that?

RBob

iTrader: (1)

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GeneralDisorder

iTrader: (1)

camaroyoungster

Is there another mask that doesn't do that? I have also tried the $88 mask I believe and it does the same thing. I eventually want to get to code $59 but the car is NA right now and I am not sure if that mask does NA stuff.

GeneralDisorder

iTrader: (1)

Well generally speaking any mask capable of forced induction is also capable of NA. All turbo engines are NA when the turbo is not spooled. You just don't go into positive manifold pressure so those areas of the maps don't get used. It's not really an issue to tune a car using a turbo capable ECM without the turbo. It's easier since you don't have to worry about boost control or boost enrichment or timing retard, etc. Just don't use those features.

GD

RBob

iTrader: (1)

The $88 mask also chatters.

Why not go with $8D? It is well known and supported.

RBob.

camaroyoungster

$8D sounds good. I am assuming I have to wire ECM up differently then? I know that $8D is for distributor engines and this engine is DIS. I'll start looking for some info.

Drew

RBob

iTrader: (1)

There may be some minor changes to the wiring. For the DIS need to change three parameters, initial SA, minimum SA, and maximum SA. I have a post on the V6 board here that explains how to do it as the XDF is likely not setup for the values that need to be entered.

RBob.

camaroyoungster

So I was doing some searching and I am not sure I want to switch to $8D. The $88 Bin I found allows the car to start up pretty ok and run pretty ok and I am not sure I want to start changing things with wiring. So my main issue is back to reading the data again. Other people really don't seem to have an issue with datalogging $88 mask. I have attached the bin, XDF, and ADX that I found. I am using an APU1 set to Emulation mode and data-logging mode per Moates instructions. Using Tunerpro RT V5. I know I am getting something because when the key is turned on I get info but it is nonsense. Looking on other Forums, people state that $A1 and $88 need special software to read? I guess I just need some direction at what I should be looking at.

Sorry for the indecision,

Drew

GeneralDisorder

iTrader: (1)

I wasn't able to datalog $88 with my AutoProm either. Fortunately it's not my car and I did solve the problem it was having by replacing the CTS and the car ran well enough for my customer to take it home, park it on his mom's lawn, and then never did get his driver's license - kids these days!

For what it's worth - my thread from 2017:

https://www.thirdgen.org/forums/tpi/...ng-issues.html

Here in 2019 I now have a really fancy-pants Snap-On Zues for my shop and I'm quite sure it will log all those weird cars like $88.... I used it on a 94 Chevy P30 motorhome chassis recently. I was amazed by how well it worked. You might try getting your hands on like an old Snap-On MT2500 or something.

GD

camaroyoungster

I might try burning a chip and try to just datalog with the autoprom. I also get ahold of someone at moates to see if they can help.

Drew

camaroyoungster

With the help of Dave from Moates, we were able to get things figured out and start datalogging. Now onto figuring out Tuning.

Drew

GeneralDisorder

iTrader: (1)

You should post the solution to the logging issue because surely someone is going to come across this thread in a search and be disappointed when they come to the end and you proclaim to have solved it but provide no details on how it was done.

GD

camaroyoungster

Well, for starters it seemed that I had a bad .ADX file for reading the data stream. I'll attach the one I used here. There were some other things changed as well but since he was going so fast I could not see what he was doing. That might not have even been the problem. So if anyone is using $A1 and is having problems, use this .ADX file. Also the Data Dash does not seem to work but the data list views does work.

Drew