lt1 restoration final steps have a bcm question

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Jul 17, 2013 | 03:47 PM

powercrazy

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lt1 restoration final steps have a bcm question

96 trans am 24x conversion installed a bcm out of a 96 z28 everything works but the car doesn't start. I know that the car and the bcm have to be synced up for the car to run. My ignition key doesn't have a resistor chip in it. So what needs to be done to have everything work at should. Thank you for the help!!!

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Last edited by powercrazy; Jul 17, 2013 at 03:54 PM.

Jul 17, 2013 | 03:50 PM

draggin97s10

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Solder in a resistor in the vats wire(yellow i believe) that runs down the column. That's the easy fix

Jul 17, 2013 | 04:03 PM

powercrazy

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there is no way of know what the resistance should be without the chip in the key correct?

Jul 17, 2013 | 04:08 PM

draggin97s10

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Quote:

Originally Posted by powercrazy

there is no way of know what the resistance should be without the chip in the key correct?

I'm sure there is, but I cannot tell you how to figure that out. There is a range of them. I think we just bought 4 or 5 and Swapped them until one worked. Someone could tell you the range of resistors that worked or you could find it somewhere.

Sorry i'm not being much help.

On a buddies car we tested the key and did it that way.

Jul 17, 2013 | 05:55 PM

ltxMonte

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The resistance for the vats are: 402, 523, 681, 887, 1130, 1470, 1870, 2370, 3010, 3740, 4750, 6040, 7500, 9530 and 11800. Since you don't have the chip for the key, you will unfortunately have to build all 15 and try them. A bulk pack for radio shack runs like $15 and has all the values to make them many times over.

Jul 17, 2013 | 06:01 PM

powercrazy

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ok thank you very much once I find the correct value the car will start with the z28 bcm there is no other way such as with a tech 2

Jul 17, 2013 | 09:53 PM

SoxXpupPeT

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Or just tune it out of the ecu. OP your car looks SICK!

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Jul 18, 2013 | 08:48 AM

xBrandonx

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Here's a pre-made bypass, http://www.ebay.com/itm/Vehicle-Anti-Theft-System-VATS-Bypass-Keycode-12-/281122283221?pt=Motors_Car_Truck_Parts_Accessories&hash=item4174319ed5&vxp=mtr

Jul 18, 2013 | 09:18 AM

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draggin97s10

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Quote:

Originally Posted by ltxMonte

There you go! That is what I did. and then

Jul 18, 2013 | 04:31 PM

#11

powercrazy

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Quote:

Originally Posted by draggin97s10

There you go! That is what I did. and then

I like that piece that is on eBay but my key doesn't have a chip in it and the bcm is out of another car. So I need to find out what resistance that bcm is looking to see. So I guess the try one resistor at a time unless there is a way to test what that bcm is looking for. Appreciate the advice everyone.