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Car will not run with ALDL connected (Part 2)

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Old Jun 26, 2005 | 09:42 PM
  #1  
IROCThe5.7L's Avatar
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From: Buffalo, NY
Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
Car will not run with ALDL connected (Part 2)

I hope it's ok to make a new thread. My friends and I believe we found the problem. Look at this datamaster screenshot with the car not running:



My buddy thinks my convertor is locking up, and thats why it runs for two seconds. Any suggestions?

Old Thread: https://www.thirdgen.org/techbb2/sho...hreadid=304310

Thanks
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Old Jun 26, 2005 | 11:48 PM
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From: STL area
Next step is to disconnect the 4 pin connector plugged into the transmission. Does it run after that? If not then make sure you have a 10K resistor(not a 3.xK or 10 ohm) for the aldl cable....
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Old Jun 27, 2005 | 12:05 AM
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IROCThe5.7L's Avatar
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Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
The cable is correct, along with the resistor.

I don't understand why it would request overdrive ONLY in ALDL mode

Last edited by IROCThe5.7L; Jun 27, 2005 at 12:07 AM.
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Old Jun 27, 2005 | 12:09 AM
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From: STL area
Originally posted by IROCThe5.7L
The cable is correct, along with the resistor.

I don't understand why it would request overdrive ONLY in ALDL mode
maybe bad ECM/harness grounds. WHat terminals are you connecting to(through the aldl port)?
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Old Jun 27, 2005 | 12:15 AM
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From: houston
Car: 83 POS monte carlo 2015 chevy P/U
Engine: 92 5.7 tpi 5.3
Transmission: 700r4 6L60E
Axle/Gears: 2.42 too high
its not unusual to see something like the TCC showing as locked or fourth gear requested with the engine off.

but even if the convertor was locked up, either because of a computer problem or a convertor problem, it would still run as long as you were in park or neutral, it would die as soon as you put it in gear & then it would start right back up with no problem once you put it back in park or neutral.

im wondering, is there a way you can hook your desk top PC up in your car & see what happens?
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Old Jun 27, 2005 | 01:12 AM
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IROCThe5.7L's Avatar
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Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
Originally posted by 11sORbust
WHat terminals are you connecting to(through the aldl port)?
I got these from Moates. It just plugs in as a whole.

http://www.moates.net/product_info.p...products_id=50

http://www.moates.net/product_info.p...products_id=49


"is there a way you can hook your desk top PC up in your car & see what happens?"

Nope, not enough cable Well lets pray it was a bad cable, Craig Moates sent me new ones, should be getting them in a few days.
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Old Jun 27, 2005 | 03:26 AM
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From: Browns Town
Car: 86 Monte SS (730,$8D,G3,AP,4K,S_V4)
Engine: 406 Hyd Roller 236/242
Transmission: 700R4 HomeBrew, 2.4K stall
Axle/Gears: 3:73 Posi, 7.5 Soon to break
With the engine not running and in diagnostic mode, won't the solenoids cycle on/off as a test?
was just looking through the $8D and saw some stuff like that on the outputs.
Is there something similar to that in your mask?
Just wondering if you really have 10K because diagnostic test would use 4.7K IIRC.
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Old Jun 27, 2005 | 03:54 PM
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From: Buffalo, NY
Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
If it means anything. With the ALDL connected, when I turn the key foward, the SES light blinks real fast, then stays steady.
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