Vats flag ineficient?
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Junior Member
Joined: Jun 2006
Posts: 38
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From: France
Car: 1990 Iroc-z and 1989 Iroc-z Conv.
Engine: 350 TPI Vortec 472RWHP
Transmission: Tremec TKO
Axle/Gears: 7.625/3.73
Vats flag ineficient?
Hi everybody!
I'm a newbie in prom programming and i'm trying to bypass the VATS on a 88 TramsAm because it's working only when it wants to and not when I put the key in the ignition. I bought a new key (it has the correct value) but it's the same thing. I know I can simply bypass the Vats the way you indicate in the tech board, But as far as I know, there is a VATS bit in the PROM. I've set it to 0 but I still have the Problem. The 'security' light comes on and it's impossible to start. So I disconnect the battery, wait for 5 min and try again. Sometimes it works, sometimes not depending on its mood I guess
Any Ideas?
Regards,
Jeremy.
I'm a newbie in prom programming and i'm trying to bypass the VATS on a 88 TramsAm because it's working only when it wants to and not when I put the key in the ignition. I bought a new key (it has the correct value) but it's the same thing. I know I can simply bypass the Vats the way you indicate in the tech board, But as far as I know, there is a VATS bit in the PROM. I've set it to 0 but I still have the Problem. The 'security' light comes on and it's impossible to start. So I disconnect the battery, wait for 5 min and try again. Sometimes it works, sometimes not depending on its mood I guess
Any Ideas?
Regards,
Jeremy.
Thread Starter
Junior Member
Joined: Jun 2006
Posts: 38
Likes: 0
From: France
Car: 1990 Iroc-z and 1989 Iroc-z Conv.
Engine: 350 TPI Vortec 472RWHP
Transmission: Tremec TKO
Axle/Gears: 7.625/3.73
Ok I guess I've found the answer! The Vats reads the key resistor value and then send a signal to the ECM to say 'ok let's kick some asphalt.........well, in fact it just say Bip!
' AND send a signal to the Relay that fires up the starter. That's why I could not manage to start the TransAm. My PROM was OK but the Relay was not!
' AND send a signal to the Relay that fires up the starter. That's why I could not manage to start the TransAm. My PROM was OK but the Relay was not! 
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