ALDL Cable Question
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Senior Member
Joined: Dec 2003
Posts: 758
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From: Ontario, Canada
Car: 1988 Pontiac Trans Am
Engine: 5.0L Fuel Injection
Transmission: Automatic 4speed /w OVerdrive
ALDL Cable Question
Ok,
I ordered my ALDL cable and installed the software on my PC that I plan on installing in my car. I was wondering. The Cable I bought has a direct harnes to hook directly to the diag port on the car. I was thinking of leaving the ALDL wire hooked up all the time and datalog non stop. Will this hurt the car/ecm?
I ordered my ALDL cable and installed the software on my PC that I plan on installing in my car. I was wondering. The Cable I bought has a direct harnes to hook directly to the diag port on the car. I was thinking of leaving the ALDL wire hooked up all the time and datalog non stop. Will this hurt the car/ecm?
Member
Joined: Nov 2003
Posts: 299
Likes: 0
From: The Netherlands
Car: Cobra Kit Car
Engine: 350 HSR
Transmission: TKO 600
Axle/Gears: 3.31
Hi hope that you don’t mind my signature picture!
ThraxXx
It can be a problem if you have a setup with a 10K resistor between A and B connector of the ALDL.
I have got some issues with the SA (Spark Advance) and RBob has instructed what to do.
It seams that GM have put and SA adder during data logging, why? I don’t know. It is possible that they introduced because some ALDL test equipment or special test requirements.
How to solve this issue?
According to RBob you need to set the value at $23 to zero. ($23 is a HEX location on the BIN file)
Most of the bins files that I have reviewed had a value of 8.09 degree of addition to the SA.
I have incorporated this change to the BIN on the ECU file of the $6E and the $32B you can download from my site.
http://www.donostia.demon.nl/6Ev011a.ecu
http://www.donostia.demon.nl/32Bv001a.ecu
Check under constants the “S.A. adder for ALDL (10K mode)”
Please be aware that I am not the holder of the official ECU file.
Regards,
Cobra289
ThraxXx
It can be a problem if you have a setup with a 10K resistor between A and B connector of the ALDL.
I have got some issues with the SA (Spark Advance) and RBob has instructed what to do.
It seams that GM have put and SA adder during data logging, why? I don’t know. It is possible that they introduced because some ALDL test equipment or special test requirements.
How to solve this issue?
According to RBob you need to set the value at $23 to zero. ($23 is a HEX location on the BIN file)
Most of the bins files that I have reviewed had a value of 8.09 degree of addition to the SA.
I have incorporated this change to the BIN on the ECU file of the $6E and the $32B you can download from my site.
http://www.donostia.demon.nl/6Ev011a.ecu
http://www.donostia.demon.nl/32Bv001a.ecu
Check under constants the “S.A. adder for ALDL (10K mode)”
Please be aware that I am not the holder of the official ECU file.
Regards,
Cobra289
Last edited by Cobra289; Jun 8, 2004 at 03:52 PM.
Thread Starter
Senior Member
Joined: Dec 2003
Posts: 758
Likes: 1
From: Ontario, Canada
Car: 1988 Pontiac Trans Am
Engine: 5.0L Fuel Injection
Transmission: Automatic 4speed /w OVerdrive
Thanks for the info.
Whats wrong with my sig. I have seen others with bigger pics then mine?
Whats wrong with my sig. I have seen others with bigger pics then mine?
Senior Member
Joined: Feb 2000
Posts: 728
Likes: 0
From: Laval, Canada
Car: 2004 BMW 330Cic
Engine: 3.0
Transmission: 6 speed
Most of the bins files that I have reviewed had a value of 8.09 degree of addition to the SA.
Also I notice that when I initiate the 10k resistor the car idles higher, and as soon as the ALDL software connects and starts receiving data the idle returns to normal. I can then remove the 10k resistor and datalogging continues uninterrupted.
My assumption has always been that the ALDL SA is when the 10k resistor is plugged into the ALDL port but no data is being transmitted, and as soon as data starts being transmitted SA returns to normal operations(no ALDL SA)...is this a correct assumption?
Member
Joined: Nov 2003
Posts: 299
Likes: 0
From: The Netherlands
Car: Cobra Kit Car
Engine: 350 HSR
Transmission: TKO 600
Axle/Gears: 3.31
Hi Poncho,
Here you can see the answer of RBob. It seams that is an addition to the normal SA value.
I have changed and the nasty behavior was gone.
Look also to the knock retard, it was also a problem due to the SA adder at the 10K mode.
I hope this will help you.
Regards,
Cobra289
Here you can see the answer of RBob. It seams that is an addition to the normal SA value.
I have changed and the nasty behavior was gone.
Look also to the knock retard, it was also a problem due to the SA adder at the 10K mode.
I hope this will help you.
Regards,
Cobra289
Have you zero'd out the SA term at $23? This is important as it is an ALDL SA adder value. Whenever you data log this SA value will be added to your current SA.
Another reason I bring that up is because of the knock retard that is happening. Look at the run starting at record # 6061.
Another problem is the BLM cell 15 value of 117. Someplace in the MAF tables BLM cell 15 is being learned in to remove a lot of fuel. This becomes a problem in this run. See #6072 through 6082 and how lean the O2 is reporting, then the knock starts.
There is also knock at every shift. Change the SA term at $23 to 0, find the rich area that is dropping BLM cell 15 and lean it a little. Then data log some more.
RBob.
Another reason I bring that up is because of the knock retard that is happening. Look at the run starting at record # 6061.
Another problem is the BLM cell 15 value of 117. Someplace in the MAF tables BLM cell 15 is being learned in to remove a lot of fuel. This becomes a problem in this run. See #6072 through 6082 and how lean the O2 is reporting, then the knock starts.
There is also knock at every shift. Change the SA term at $23 to 0, find the rich area that is dropping BLM cell 15 and lean it a little. Then data log some more.
RBob.
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