What all does Vats system control?
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Joined: Nov 2010
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From: Murfreesboro Tn.
What all does Vats system control?
I am wondering if I have a Vats issue... Will the fuel pump still engage if I have a vats issue on a 1986? Sometimes it won't even turn over, other times it will turn over/start, but immediately die like it isn't get fuel.... Other times it start right up...I have on my mind bypassing the vats... I read on another thread you could do it behind the bread box...
I have also noticed the security light will flash if I have the door open even with the key in it & turned to on...
I have also noticed the security light will flash if I have the door open even with the key in it & turned to on...
Le Mans Master
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From: One day you're a Comet...the next day you're dust... Arkansas
Vats will not let the starter turn over. Not positive about the 1986 but on my 1989 I installed a jumper to bypass VATS under the drivers side dash. It is available from the Corvette catalogs and is plug and play.
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From: Murfreesboro Tn.
That sounds like my issue at the moment.. Will the fuel pump still engage?
I read where you can add a jumper behind the breadbox to bypass it, but I am not 100% sure that is the issue..
Burning Brakes
Joined: Feb 2009
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From: Richmond Virginia
Vats does not control the fuel pump. It allows starter enable (engage) and sends a signal to the ECM---without this signal the ECM will not pulse the fuel injectors. In short VATS doesn't control fuel pressure, but it does control whether or not fuel gets to the combustion chamber.
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From: Murfreesboro Tn.
Vats does not control the fuel pump. It allows starter enable (engage) and sends a signal to the ECM---without this signal the ECM will not pulse the fuel injectors. In short VATS doesn't control fuel pressure, but it does control whether or not fuel gets to the combustion chamber.
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From: Murfreesboro Tn.
I took the battery form the truck and placed it in the Vette... The same thing happened it would turn over..
I will say I turn the lights on and cranked it & the lights didn't dim, which nakes me think the starter isn't pulling any power.. That led me to think that that Vats system...
Other times it will turn over, fire and then die right back off like it doesn't have fuel.... then you can let it sit for a few and it fire right up....
Melting Slicks
Joined: May 2010
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From: Conowingo Maryland
If it will not crank over right now take a volt meter and see if you have 12 volts on the main lug at the starter. then have someone turn the key to crank and see if you have 12 volts on the s term at the starter. You need 12 volts on both while trying to crank. See what you have there and lets us know
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From: Murfreesboro Tn.
If it will not crank over right now take a volt meter and see if you have 12 volts on the main lug at the starter. then have someone turn the key to crank and see if you have 12 volts on the s term at the starter. You need 12 volts on both while trying to crank. See what you have there and lets us know
Okay.. Hopefully I can get it tested on Sunday.. Thanks
Instructor
Joined: Oct 2007
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VATS shuts down the fuel injectors and the starter, it works through the resistor in the key. I did a Vats-pendectomy and am very happy with the results. I no longer walk home.
The sensor and the computer are not good for this long. The key gets worn, the computer switch becomes iffy, The fix is to rechip the computer (turn the fans on sooner at the same time) splice two wires behind the radio and that is it. No more walking
The sensor and the computer are not good for this long. The key gets worn, the computer switch becomes iffy, The fix is to rechip the computer (turn the fans on sooner at the same time) splice two wires behind the radio and that is it. No more walking
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From: Murfreesboro Tn.
VATS shuts down the fuel injectors and the starter, it works through the resistor in the key. I did a Vats-pendectomy and am very happy with the results. I no longer walk home.
The sensor and the computer are not good for this long. The key gets worn, the computer switch becomes iffy, The fix is to rechip the computer (turn the fans on sooner at the same time) splice two wires behind the radio and that is it. No more walking
The sensor and the computer are not good for this long. The key gets worn, the computer switch becomes iffy, The fix is to rechip the computer (turn the fans on sooner at the same time) splice two wires behind the radio and that is it. No more walking
Last edited by cutnitclose; May 21, 2011 at 08:37 AM.
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From: Murfreesboro Tn.
Update.. Went out 5 minutes later and she fired right up... I let it sit there and run for 5 minutes...
I disconnected the ground cable as I want be able to do anything with it until late tonight...I am wondering if it will turn over if I keep the ground disconnected (never have tried that)...
I disconnected the ground cable as I want be able to do anything with it until late tonight...I am wondering if it will turn over if I keep the ground disconnected (never have tried that)...
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From: Cedar Rapids Iowa
VATS Fix
Drop in at your favorite AUDIO shop, ask them to determine the OHM on your Ign key, then as them for a resistor in the same range, then just unplug the connector from the VATS at the base of the steering column, and insert the resistor into the "car side" of the connector, and tape securely, and you will effectively by pass the VATS. With the resistor in place, your system will think the key is in place, and no more starting problems due to the broken wire in your steering column connected to the ignition switch, which controls the VATS. GG
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From: Murfreesboro Tn.
Went out tonight and attached the grond cable with the thought it would start (like it did this morning)... Of course I was wrong...... It wouldn't hit a lick.. Everything comes up, but won't turn over...lol.. I guess I will try it again in the morning..
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From: Murfreesboro Tn.
Well I think I found the problem (fingers crossed for good luck)... I pulled the starter relay and it was full of crud/gunk.... I guess it is from 26 years of dirt and grime.. I looked like someone had poured a coke in there... I cleaned it really good with some electronic/contact cleaner & it fired right up... I am afraid to say it is fixed, but I will update as the week goes on to let everyone know....
Thanks again to everyone for the help/info/suggestion.. Hopefully it is good to go now..
Thanks again to everyone for the help/info/suggestion.. Hopefully it is good to go now..
Le Mans Master
Joined: Aug 2000
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From: Australia
You will still have security because VATS won't let any fuel into the engine unless the correct key is in the ign
If either are faulty ;the resistor " trick " will achieve little
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From: Murfreesboro Tn.
Remove and bypass the starter relay altogether ( the two wires to be joined as mentioned above)
You will still have security because VATS won't let any fuel into the engine unless the correct key is in the ign
So long as the VATS module and starter relay are operating correctly.
If either are faulty ;the resistor " trick " will achieve little
You will still have security because VATS won't let any fuel into the engine unless the correct key is in the ign
So long as the VATS module and starter relay are operating correctly.
If either are faulty ;the resistor " trick " will achieve little
I think I will possibly remove the relay if it acts up again.. So far it has cranked everytime (fingers crossed & knocking on the wooden coffe table)
