91 Z28 VAT's bypass?
#1
91 Z28 VAT's bypass?
I've been dealing with the VAT's not letting my car start for almost 2 months now, and I've finally decided to learn how to fix it. I read that if you bypass the VATs you also have to bypass something with the ECM for it to start, is that true? And if anyone could link me, or give me instructions on how to bypass the VAT's I'd appreciate it, thanks
#2
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Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: 91 Z28 VAT's bypass?
What do you want to do ?
Bypass the key ( most common cause of starting problems ) cheapest / easiest
or delete VATS completely ; more expensive and time consuming
Two completely different setups ; also related to WHAT is your actual problem ,the popular bypassing of the key with resistors will do little if your problem is with another part of VATS
Do a search , plenty of VATS how to articles on here
https://www.thirdgen.org/vats
https://www.thirdgen.org/forums/elec...ing-v-t-s.html
read
https://www.thirdgen.org/vats_passkey_system
so you understand what you are dealing with
#3
Re: 91 Z28 VAT's bypass?
Have you done anything to identify exactly what part of the VATS system is the problem? Key , relay , module .........?
What do you want to do ?
Bypass the key ( most common cause of starting problems ) cheapest / easiest
or delete VATS completely ; more expensive and time consuming
Two completely different setups ; also related to WHAT is your actual problem ,the popular bypassing of the key with resistors will do little if your problem is with another part of VATS
Do a search , plenty of VATS how to articles on here
https://www.thirdgen.org/vats
https://www.thirdgen.org/forums/elec...ing-v-t-s.html
VATS has 2 parts
read
https://www.thirdgen.org/vats_passkey_system
so you understand what you are dealing with
What do you want to do ?
Bypass the key ( most common cause of starting problems ) cheapest / easiest
or delete VATS completely ; more expensive and time consuming
Two completely different setups ; also related to WHAT is your actual problem ,the popular bypassing of the key with resistors will do little if your problem is with another part of VATS
Do a search , plenty of VATS how to articles on here
https://www.thirdgen.org/vats
https://www.thirdgen.org/forums/elec...ing-v-t-s.html
VATS has 2 parts
read
https://www.thirdgen.org/vats_passkey_system
so you understand what you are dealing with
#6
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iTrader: (13)
Join Date: Apr 2005
Location: Not in Kansas anymore
Posts: 7,733
Likes: 0
Received 11 Likes
on
11 Posts
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: 91 Z28 VAT's bypass?
Just because you can read the resistance of the key doesn't mean the system can
If the VATS module is not reading the key because of a broken wire or dirty /worn contacts in the Ign barrel you see the resistance means little
Last edited by vetteoz; 08-05-2013 at 03:53 AM.
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