help me with a better understanding of vats
03-24-2008, 05:58 PM
#1
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Car: '91 vert RS, '82 Z28
Engine: TBI 305, TPI 350
Transmission: Auto, 5 speed
help me with a better understanding of vats
So I have been doing much reading on this system of vats since I decided to undertake the tbi-tpi swap in my 91 Camaro. from what i have read my understanding is that the vats module reads the resistance of the key and determines if the ecm recieves the ok go time command. My question now is this; is there a specific vats module for each ecm or is it that the one module can talk to all ecms?
03-24-2008, 06:54 PM
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Car: 1990 Camaro RS
Engine: L03 305 TBI
Transmission: 700R4
Axle/Gears: 2.73
Re: help me with a better understanding of vats
As long as both use the passkey I system, yes, they can talk. Only after switching to the passkey II system does the module operate at a 50Hz cycle, rather then the 30Hz that the passkey I uses.
03-24-2008, 10:06 PM
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Car: '91 vert RS, '82 Z28
Engine: TBI 305, TPI 350
Transmission: Auto, 5 speed
Re: help me with a better understanding of vats
would you know when they switched to the passkey II system? would it have been for the 93+ F-bodys
03-25-2008, 12:16 AM
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Car: 1990 Camaro RS
Engine: L03 305 TBI
Transmission: 700R4
Axle/Gears: 2.73
Re: help me with a better understanding of vats
Yeap, they switched to II in 1993. Same goes for the Firebirds and TA's.
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