Please Help!! Car Will Not Start. Any Ideas?

All, I have a 1989 Chevy Corsica 2.8 V6, that has about 158,000 miles on it. These miles are mostly highway as I drive a 100 miles (65mph) to and from work. Anyways my problem;
The car will not start. I have spark on each cylinder wire. I have pulled the plenum to get to the fuel injectors. Each injector fires (used baby jars to catch fluid). I also checked each injector wire with a injector noid light and each injector wire lights. I have 45 pounds of fuel pressure at the rail. I have a 12 code from the computer, which says everything is fine. I drained all the gas and replaced with three gallons of new. I figured at this point it has something to do with timing so I proceeded to crank sensor. I got that out and replaced it as it was cracked but it still tested good. Still no start. I am moving to the DIS Module as it controls timing and injector-ECM firing under 400 RPM. I am also going to test the temperature control sensor. Does these seem like reasonable tests?
I have done a compression test on 2,4,6 and they read within spec according to the factory spec manual (100 pounds minimal) with #2 being the lowest at about 110 pounds.
The problem began when the vehicle was at 65 mph and it died out unexpectedly. About a hour later it drived fine and I drove it another week about 600 miles with no problem. I parked the vehicle to change to my summer vehicle and a few months past, now it will not start at all.
Any Ideas? Please help.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Hi,
It looks like you either have a vapor lock or a bad electronic control module. Before you replace the control module, try looking at the wire connections first to se if they are loose or burned. Hope this helps. Dave
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
I would also suspect the computer as per your description. Everything checks out within specs but it won't run, yet there's no codes (a malfunctioning computer likely would malfunction in providing codes as well). FWIW: My '89 Z24 convertible wouldn't start when I got it out of the barn for spring. I ended up having to clean the crank sensor connector as they get oil-fouled and prevent starting. There's a TSB regarding this crank sensor connectctor issue, although your situation doesn't sound like that at all. I just mentioned it because your situation was similar to mine (car sat for awhile, same engine, year etc.) Another episode with that same car resulted in extensive checking of systems, sensors replaced, etc., still wouldn't run right, finally determined the computer to need replacing (no codes due to this).
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Solomon_Man wrote:

My 3800 from the same era did this. Drove two machanics crazy. The GM garage came back with the answer - the synthetic teeth on the main timing cog had ground down and the chain was basically trying to run on two teeth(spinning randomly).
No computer codes. Nada. Just wouldn't run. New timing gear and chain fixed it.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.