LTX and LSX Putting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.

94' LT1 vats question

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Old 01-11-2010, 01:17 PM
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Car: 79' LT1 olds cutlass/ 87' IROC
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94' LT1 vats question

im doing an lt1 engine swap and just have the computer. no resistor key or theft deterent module.

i need to produce the 50hz with 50% duty cycle signal to the fuel enable signal wire that goes to the computer so that it will enable the fuel system... more importantly the injectors.

does anyone have a simple and legible diagram of passkey2 bypass module. the one that uses the 555 timer, a couple of diodes and a couple of resistors and some other stuff... i don't really know the entire parts list because i haven't seen it done or a clean legible diagram of it.

thanks in advance.
Old 01-11-2010, 02:31 PM
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Re: 94' LT1 vats question

Just tune it out of the PCM. Its a simple check flag
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