powercrazy

iTrader: (3)

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!!!

draggin97s10

iTrader: (2)

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

powercrazy

iTrader: (3)

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

draggin97s10

iTrader: (2)

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.

ltxMonte

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.

powercrazy

iTrader: (3)

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

SoxXpupPeT

iTrader: (34)

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

BizZzatch350

iTrader: (33)

My 93 didn't have a BCM so I never had this issue, but clean Trans Am

xBrandonx

iTrader: (11)

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

draggin97s10

iTrader: (2)

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

powercrazy

iTrader: (3)

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.

nitrous2fast

iTrader: (2)

If you had a potentiometer and a multimeter you could find out decently quick. Don't know if it would be faster or not.

ltxMonte

You can tune the vats out of the pcm, but not the bcm, which kills the starter. I don't know that the other way would be any faster...