Deleting VATS

[kwiksilverz28]

1998 Z28. I have turned off VATS I thought. Car is rarely driven. Every few months the security light starts flashing again. I want to completely delete the VATS. How the heck do I do it and make the security light go away forever?!?!

[HartRod]

Did you remove the DTCs associated with the VATS?

[kwiksilverz28]

No. From what I read I just had to deselect it. What DTC's?

[HartRod]

Post your tune and I'll check.

[kwiksilverz28]

Awesome! Thanks!!!!

[HartRod]

Try setting P1626 to 3 no report. Did you do a "write entire" when you deleted the VATS?

[kwiksilverz28]

I did. Multiple times. Every time the Security light shows up I do and it is fine for like a month or 2 (sitting. The car only gets driven a few times a year). I will try that code! I will let you know in a few months lol!!!

[PitchblackC3]

If it is like the Corvette the security does more than just the VATS. Even if you disable VATS in the tune the security may still be active in the BCM for the other functions.

[ahartz28]

you likely have a broken wire in your ignition cylinder...

[mrr23]

reading this thread suggests a problem the vats module is seeing outside the pcm control
http://www.hptuners.com/forum/showth...t=disable+vats

you can also find the ohm resistance of your key and go to radio shack, buy enough resistors to match the ohm reading and plug it into the orange wire in the column.

[kwiksilverz28]

Thank you all. I have been fiddling and I am leaning towards the ignition cylinder too. They are not that expensive and I have done them before (albeit sans VATS), so I may just pop a new one in and retain the VATS. A new cylinder every 16 years isn't that big a deal lol

[INDYLSX]

Is it not possible to completely delete the vats?

[Troy_Fields]

I am having trouble in a L67 swap. The engine will start and run for 2 seconds and then it dies. won't restart until you wait a few and cycle the key.

[MikeOD]

98-02 F-Body VATS is BCM for starter interrupt and PCM for engine kill.

Disabling it in the PCM works for engine swaps, if you've got a 4th gen that won't start/flashes the security light though, you need to fix the problem in ignition cylinder/steering column, or as mentioned above match the key resistance into the 2 orange wire harness in the column and disconnect it from the ignition cylinder.

I think there are 7 possible resistance values for those keys...and I also believe that if you get any value and run a full VATS relearn it'll work.

[MikeOD]

Now that I think about it more, I believe there's also a relay under the hood that you can bypass to remove the starter interrupt, then you'd see the light flash but it can't do anything.

[Ranger6202]

+1 on the relay under the hood to bypass the starter hold out. I got a silverado running by doing that. Turned out to be a crappy ignition switch that you had to jiggle the shifter and steering column to start working right. But i do believe the VATS will disable your injectors, thus the 2 second run till dying issue.

[MikeOD]

+1 on the relay under the hood to bypass the starter hold out. I got a silverado running by doing that. Turned out to be a crappy ignition switch that you had to jiggle the shifter and steering column to start working right. But i do believe the VATS will disable your injectors, thus the 2 second run till dying issue.

Yeah, disabling it in the tune won't fix the starter interlock, and bypassing the starter interlock relay won't fix the fuel kill...you need to do both on those F-Bodies to disable it.