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VAT's problem????

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Old Sep 10, 2009 | 11:53 AM
  #1  
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Default VAT's problem????

Twice now my 95' has faild to start. Nothing happens when you turn the key. No dash board lights, nothing. I'm assume it's a VAT's problem.
1st time it happened after several attempts it cranked. Radio and all the gauges reset.
2nd time after several un-successful attempts to start. I removed the positive cable from the battery. As soon as reconnected it the security system activated and car started.
Any ideas before I take it to the dealer?
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Old Sep 10, 2009 | 01:58 PM
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More than likely the vats, or you could try a different key if you have one. I bypassed my vats and it was the best thing I ever did. I don't have time to mess with a flawed security system (vats) that has so many quirks.
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Old Sep 10, 2009 | 02:18 PM
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Hey Billy, How do you bypass the vats. Is it a big job ?
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Old Sep 10, 2009 | 02:42 PM
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Bad connection between the negative battery terminal and the negative cable.....clean and tighten.
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Old Sep 10, 2009 | 03:03 PM
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Originally Posted by runner140*
Bad connection between the negative battery terminal and the negative cable.....clean and tighten.
When it's a VATS issue, you'll at least have a lit dash.
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Old Sep 10, 2009 | 03:22 PM
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Clean, tight connections at battery,starter and block, are a must, and will likely cure your problem.
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Old Sep 10, 2009 | 05:48 PM
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i am experiencing the same problem. i went to the dealer to have my key tested and he said it was fine. he told me there is a little copper wire inside the cylinder that goes bad after all the turning. he said it is not the vats
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Old Sep 10, 2009 | 07:25 PM
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it's likely not VATS. VATS has a time out feature if it fails you can't start it right away again
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Old Sep 10, 2009 | 10:42 PM
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Originally Posted by Allieboy
i am experiencing the same problem. i went to the dealer to have my key tested and he said it was fine. he told me there is a little copper wire inside the cylinder that goes bad after all the turning. he said it is not the vats
Stay as far away from that dealer as you can get yourself. The ign lock has contacts in it that connect to the key pellet and allows the VATS module to measure the pellet resistance. All of this is part of VATS and if the contacts or the wires out of the contacts stop working, its a VATS problem and VATS will not allow the car to crank and start running.
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Old Sep 12, 2009 | 01:29 PM
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Well guys I had an intermitent "no start" issue with my 86 C4. I started a couple threads on here and most everyone and the FSMs said "if it was VATS it wouldn't crank", and sent me off looking at other posibilities. So I kept looking for the grimlin for quite a while (months). Finally fed up, I bought the "VATs bypass harness". Simple install. Takes 10 minutes maybe. Mine has started every time ever since the bypass went in. My issue didn't pass the logic test per VATS design, as it always cranked. But it was a VATS issue none the less!
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Old Sep 12, 2009 | 06:41 PM
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If I buy the vats bypass they sell ,will my alarm still work when the doors are opened?
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Old Sep 12, 2009 | 10:58 PM
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Originally Posted by tblt44
If I buy the vats bypass they sell ,will my alarm still work when the doors are opened?
It would on my 86, not 100% sure on your year.
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Old Sep 13, 2009 | 07:49 PM
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Originally Posted by AGENT 86
It would on my 86, not 100% sure on your year.
works on my 92 and I'm bypassed
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