1990 Corvette (Y Body) ADX File?

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12-08-2014
C4ProjectCar

1990 Corvette (Y Body) ADX File?

I have a 1990 C4 (6-speed coupe, if it matters), ECM 1227727, and I'm trying to connect to the ECM with the ALDLDroid Android app via an ALDL Bluetooth connector. I've tried several different ADX files I've found online, but I have issues with each one. I try connecting both key on, engine off and with the engine running, yet I rarely can connect. I'm either getting incorrect checksum or incorrect response length errors.
Every now and then I get lucky and connect, but more often than not I am not able to do so. Even when I connect, sometimes some of the sensor data displayed is incorrect by a large enough margin to indicate an error of some sort.
I'm trying to narrow down the problem, but first I want to make sure I am using the proper ADX file. Does anyone have an ADX they know works with a 1227727 ECM in a '90 C4?
12-08-2014
1project2many

I can't help much with Tunerpro but I might suggest the issue is Y body specific. The 'Vette uses a "Central Control Module" that (IIRC) either needs to be given a command to stop chatter, or is the primary communication on the ALDL line. Software such as Datamaster has specific options for the CCM equipped vehicle.
12-08-2014
C4ProjectCar

Quote:

Originally Posted by 1project2many

I can't help much with Tunerpro but I might suggest the issue is Y body specific. The 'Vette uses a "Central Control Module" that (IIRC) either needs to be given a command to stap chatter, or is the primary communication on the ALDL line. Software such as Datamaster has specific options for the CCM equipped vehicle.

Thanks. Do you think it would be feasible for me to find an ADX for a '90 TPI and then add in the code to silence CCM chatter? I've never done anything like this in regards to tuning, but I do have quite a bit of programming experience.
12-08-2014
1project2many

Possibly but I really can't speak about TP with any authority.
12-08-2014
1BadAction

C4- Where is the ECM located on the 90, and what chip adapters are you using? My mom has a vert and I'm thinking of doing a few logs and a tune for one of her Christmas presents, but I'll need to order the parts to do it now. All I have is the G1 that works with later ECMs.
12-08-2014
C4ProjectCar

Quote:

Originally Posted by 1BadAction

C4- Where is the ECM located on the 90, and what chip adapters are you using? My mom has a vert and I'm thinking of doing a few logs and a tune for one of her Christmas presents, but I'll need to order the parts to do it now. All I have is the G1 that works with later ECMs.

The ECM is located on the driver's side of the engine bay near the firewall. I'm not using a chip adapter (yet). I still have to order it along with Ostrich. According to my notes though, the G1 works.
12-08-2014
1BadAction

Quote:

Originally Posted by C4ProjectCar

The ECM is located on the driver's side of the engine bay near the firewall. I'm not using a chip adapter (yet). I still have to order it along with Ostrich. According to my notes though, the G1 works.

Ahhh I see. Thank you sir!