Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Sponsored by:
Sponsored by: CARiD

'89 L03 no start - VATS?

Thread Tools
 
Search this Thread
 
Old Oct 15, 2005 | 10:14 AM
  #1  
Buck268's Avatar
Thread Starter
Supreme Member
20 Year Member
 
Joined: Aug 2001
Posts: 1,041
Likes: 0
From: Troy, MI, USA
'89 L03 no start - VATS?

Wrenchin on the '89 WS6 Formula (L03/700r4), trying to get her running.

Basically, battery is "good" (good enough anyways), all electrics seem to work, ign switch seems to work (acc., key off and key on engine off) just wont start at all. No cranking, no selinoid engaging, but the inst. cluster goes through the typical starting deal.

Actually, two lights light up that have me a little confused (haven't driven this car in a few years). First is the brake light, should that go off with my foot on the brake during engine starting, or does it always come on? Second is the security light. It lights up when I try to start, and I'm almost htinking its a problem with the VATS system, maybe even just a loose/broken wire. Unforutnately there is very little info on this system around.

Guess I'm asking really only 1 specific question. Assuming the vats doesnt get the proper signal needed (for whatever reason), how would the car react to a start-up attempt?
Reply
Old Oct 15, 2005 | 10:18 AM
  #2  
dankhound's Avatar
Supreme Member
 
Joined: Jan 2002
Posts: 1,322
Likes: 1
From: Bloomingdale,IL
Car: 91 RS
Engine: 305 Tbi (L03)
Transmission: 700r4
Exactly like you said yours is acting.
Reply
Old Oct 15, 2005 | 10:21 AM
  #3  
Buck268's Avatar
Thread Starter
Supreme Member
20 Year Member
 
Joined: Aug 2001
Posts: 1,041
Likes: 0
From: Troy, MI, USA
hmm, so I guess I need ot trouble shoot the VATS. Great.

Well first things first, test the wires/circuits. Really have never messed with this stuff before, but maybe somebody could point me towards some info on this system?
Reply
Old Oct 15, 2005 | 10:38 AM
  #4  
Buck268's Avatar
Thread Starter
Supreme Member
20 Year Member
 
Joined: Aug 2001
Posts: 1,041
Likes: 0
From: Troy, MI, USA
Key is suspect, getting extremely high resistance through the "chip" (I know its just a resistor). Does anybody know what range it should be in, I'm aware there are a few different exact resistances.
Reply
Old Oct 15, 2005 | 12:11 PM
  #5  
PhLaXuS's Avatar
Supreme Member
 
Joined: Feb 2005
Posts: 1,034
Likes: 0
From: Fort Lauderdale, FL
Car: 91 Camaro RS
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: 2.73 Posi w/Disc
If you're going to temporarily wire a resistor into the VATS input, start off with a 1.5k. For some crazy reason, every thridgen I've seen has a 1.5k VATS key.
Reply
Old Oct 15, 2005 | 02:01 PM
  #6  
Buck268's Avatar
Thread Starter
Supreme Member
20 Year Member
 
Joined: Aug 2001
Posts: 1,041
Likes: 0
From: Troy, MI, USA
Oddly enough, I got a second set of hands and got a better reading on the key chip. 7.48k, so I'm going to run two 3.9k (actual measured value of 3.82k and 3.81k ) in series for a total of about 7.8k; hopefully that is within the fault tolerance for the VATS decoder.

In any case, I did narrow it down to a switch-position sensitive VATS resistance issue, so I figure worst comes to worst I'll just have to tear down the steering column (which needs down anyways as the tilt is busted).
Reply
Old Oct 16, 2005 | 09:52 AM
  #7  
Buck268's Avatar
Thread Starter
Supreme Member
20 Year Member
 
Joined: Aug 2001
Posts: 1,041
Likes: 0
From: Troy, MI, USA
VATS wires on ign. cylinder broke...
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Jake_92RS
Tech / General Engine
8
Jan 28, 2020 10:37 PM
Street Lethal
Power Adders
634
Apr 30, 2019 12:14 PM
Orr89RocZ
Power Adders
206
Apr 25, 2016 08:28 AM
Spyder_TheGamer
Tech / General Engine
1
Dec 25, 2015 05:07 PM
djmarch
Tech / General Engine
3
Aug 19, 2015 12:07 PM




All times are GMT -5. The time now is 10:42 PM.