'92 LT1 scan problems?
Thread Starter
Le Mans Master
Joined: Apr 2000
Posts: 6,341
Likes: 1
From: Shelton CT
'92 LT1 scan problems?
Ok this is really odd.
What happens :
I turn the car to on (but don't start), and when I try TTS Datamaster using a laptop with a real serial port, everything seems good. It stays connected when reading or monitoring mode.
Then I start the engine, and it disconnects and resynchs, and keeps doing this for good. I get maybe a data reading every 10 seconds.
Turn the engien off, everything back to working properly again.
WTH??
This I've tried :
Two other Laptops with USB/SERIAL adaptors, none worked.
Messing with turning FIFO off and or setting different buffer sizes.
Messing with the flow control, baud rate, parity, etc.. on the serial port's settings tab.
Checked grounds, even ran wire from battery negative to cable, no difference.
Disabled Firewire/Infrared, anything I could think of.
The ALDL cable is a home made self-powered one that I used on my '85 with WINALDL,so I know it worked at least..
Freescan doesn't even seem to read anything at all..
I want to read the data on the car so I can do some tuning on it, but am at a loss. Anyone got any ideas?
What happens :
I turn the car to on (but don't start), and when I try TTS Datamaster using a laptop with a real serial port, everything seems good. It stays connected when reading or monitoring mode.
Then I start the engine, and it disconnects and resynchs, and keeps doing this for good. I get maybe a data reading every 10 seconds.
Turn the engien off, everything back to working properly again.
WTH??
This I've tried :
Two other Laptops with USB/SERIAL adaptors, none worked.
Messing with turning FIFO off and or setting different buffer sizes.
Messing with the flow control, baud rate, parity, etc.. on the serial port's settings tab.
Checked grounds, even ran wire from battery negative to cable, no difference.
Disabled Firewire/Infrared, anything I could think of.
The ALDL cable is a home made self-powered one that I used on my '85 with WINALDL,so I know it worked at least..
Freescan doesn't even seem to read anything at all..
I want to read the data on the car so I can do some tuning on it, but am at a loss. Anyone got any ideas?
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Gabe, I use a AKM cable and I haven't had any problems reading a early LT1 car. It could be that your cable has that 10k ohm resistor in it for the early MAF cars? If that is so, try removing it.
Le Mans Master
Joined: Feb 1999
Posts: 9,913
Likes: 37
From: South Carolina
St. Jude Donor '03 & '05
Originally Posted by tjwong
Gabe, I use a AKM cable and I haven't had any problems reading a early LT1 car. It could be that your cable has that 10k ohm resistor in it for the early MAF cars? If that is so, try removing it.
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Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Originally Posted by steve40th
10KOHM resistor?WIll this affect a 93LT1with speed density?
Le Mans Master
Joined: Feb 1999
Posts: 9,913
Likes: 37
From: South Carolina
St. Jude Donor '03 & '05
Last night I figured mine out. I powered up the laptop. Opened device manager and looked at ports ?(COM and LPT). Then I took the cable from AKM and and plugged it into the laptop. Then the PORTS(COM &LPT) opened up and showed a new device, the AKM cable. But it was labeled as COM 6, so I changed it in its propertys, to COM 3. And voila after that the Datamaster worked great. Simple. But, it wouldnt give me any of these options till I plugged the cbale in.
Also, on the AKM cable , if you are using the serial to USB conversion there is a white dipswitch that needs to be in a position so the fans come on when you plug it into the ALDL with the ignition on.
Hope this helps, Steve
Also, on the AKM cable , if you are using the serial to USB conversion there is a white dipswitch that needs to be in a position so the fans come on when you plug it into the ALDL with the ignition on.
Hope this helps, Steve
Thread Starter
Le Mans Master
Joined: Apr 2000
Posts: 6,341
Likes: 1
From: Shelton CT
I'm beginning to think it is a bad cable or the cable isn't compatible with my '92.. I had a buddy hook his Tech 2 up to the car and all the data was flowing and displaying while the car was running sweetly..
So where is the best and cheapest place to get a cable for my '92 so I can finally datalog it?
I saw the USB ALDL setup from Moates.net, but that's like $80+ for both parts just for the wire. Then the software cost, etc...
So where is the best and cheapest place to get a cable for my '92 so I can finally datalog it?
I saw the USB ALDL setup from Moates.net, but that's like $80+ for both parts just for the wire. Then the software cost, etc...
