Notices
C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Am I looking at VATS here? 1986

 
Old 05-07-2019, 01:55 PM
  #1  
3D-Aircrew
CF Senior Member
Thread Starter
 
3D-Aircrew's Avatar
 
Member Since: Nov 2007
Location: Gainesville FL
Posts: 1,685
Received 69 Likes on 67 Posts
Default Am I looking at VATS here? 1986

Yesterday I went to my car to drive home and when I turned the key to start there was no sound or crank ... all the dash lights were normal but there was no voltage drop when I turned to crank.. It had happened before and I disconnected the battery and it restarted OK. Yesterday I disconnected it and it did NOT restart immediately.

I left the car for 15 minutes and returned and it started right up. It started at the store yesterday and it started this morning. I have a VATS bypass installed but I'm wondering if my VATS module is going bad. Help! This makes me not trust the car
3D-Aircrew is online now  
Old 05-07-2019, 01:58 PM
  #2  
Tom400CFI
CF Senior Member
 
Tom400CFI's Avatar
 
Member Since: Aug 2004
Location: Park City Utah
Posts: 14,274
Received 632 Likes on 561 Posts
Default

What does the "Security" light do when you turn the ignition to "Run"/on?
Tom400CFI is online now  
Old 05-07-2019, 02:06 PM
  #3  
3D-Aircrew
CF Senior Member
Thread Starter
 
3D-Aircrew's Avatar
 
Member Since: Nov 2007
Location: Gainesville FL
Posts: 1,685
Received 69 Likes on 67 Posts
Default

Originally Posted by Tom400CFI View Post
What does the "Security" light do when you turn the ignition to "Run"/on?
It comes on.
3D-Aircrew is online now  
Old 05-07-2019, 03:28 PM
  #4  
Tom400CFI
CF Senior Member
 
Tom400CFI's Avatar
 
Member Since: Aug 2004
Location: Park City Utah
Posts: 14,274
Received 632 Likes on 561 Posts
Default

My bad, the Security light on an '86 isn't connected to the starting system.

I'd unplug the Theft Dterent system two pin plug under the driver's dash, and run an continuity check through that circuit up through the column and back down. Need the key in the ignition for that test.
Tom400CFI is online now  
Old 05-07-2019, 06:44 PM
  #5  
hcbph
CF Senior Member
 
hcbph's Avatar
 
Member Since: Aug 2013
Location: Minneapolis Mn
Posts: 3,632
Received 372 Likes on 355 Posts
Default

If the security light is not on when you turn the key to start then I doubt it's Vats. At one point my 86 was doing somewhat similar actions. In my case it turned out the battery was going bad, once replaced the problem went away.
hcbph is offline  
Old 05-08-2019, 11:53 AM
  #6  
3D-Aircrew
CF Senior Member
Thread Starter
 
3D-Aircrew's Avatar
 
Member Since: Nov 2007
Location: Gainesville FL
Posts: 1,685
Received 69 Likes on 67 Posts
Default

Originally Posted by hcbph View Post
If the security light is not on when you turn the key to start then I doubt it's Vats. At one point my 86 was doing somewhat similar actions. In my case it turned out the battery was going bad, once replaced the problem went away.
I don't think the battery is the culprit since when it is working, most of the time it draws the voltage down to ~11V while cranking. When it fails there is no draw on the battery. One thing I haven't tried is to tap on the starter solenoid with a stick.
3D-Aircrew is online now  
Old 05-08-2019, 07:09 PM
  #7  
playsdixie
CF Senior Member
 
playsdixie's Avatar
 
Member Since: Jun 2013
Location: ft myers FL/Munising MI
Posts: 1,394
Received 31 Likes on 29 Posts
Default

two things have happened to me to make my 85 do the same thing....1, I installed battery cut offs on my side post battery to better access the cables....occasionally it wouldn't start yet simply attaching cables allowed it to start...removed them and have no further problems....also, I broke the transmission cable a couple of years ago...a real pain to install, and ever since, even in park, it won't start....I have to give it a little push on the gear shift to get it to start....never found out why it does that, figured it made a good "kill switch"....couldn't start it without a tiny push on the shifter.....
playsdixie is offline  
The following users liked this post:
3D-Aircrew (05-11-2019)
Old 05-12-2019, 08:04 AM
  #8  
Pa'svette
CF Senior Member
 
Pa'svette's Avatar
 
Member Since: Mar 2015
Location: SE Ohio
Posts: 466
Received 31 Likes on 29 Posts
St. Jude Donor '16-'17-'18
Default

Originally Posted by 3D-Aircrew View Post
Yesterday I went to my car to drive home and when I turned the key to start there was no sound or crank ... all the dash lights were normal but there was no voltage drop when I turned to crank.. It had happened before and I disconnected the battery and it restarted OK. Yesterday I disconnected it and it did NOT restart immediately.

I left the car for 15 minutes and returned and it started right up. It started at the store yesterday and it started this morning. I have a VATS bypass installed but I'm wondering if my VATS module is going bad. Help! This makes me not trust the car
My 91 did the same thing ( left me stranded a few times) . After cooling off for a while it would start fine. It turned out to be the starter. I think heat kills them.
Just my .02 cents worth.
Pa'svette is offline  
 


Thread Tools
Search this Thread
Sponsored Ads
Vendor Directory

Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: