Howdy!

My '93 Buick Regal (3.8L, 140K) won't start. Here's what happened:

Day 1: The car drove fine & dandy. Came home after a day of city driving with multiple destinations. Parked the car & turned it off.
Day 2: Cold morning, put key in, the engine cranks but will not fire. Pull the #1 plug - no spark.

In the past seven months I've replace the computer, TPS and the MAF. My gut reaction is that the camshaft sensor (or magnet) is the issue.

Any recommendations?

Thanks!

Check all fuses including those under the dash on passenger side.
Check all three front cylinders for spark.

If all three aren't sparking then the prime suspects are the ignition control module (ICM) or crank sensor. I also like to make sure the ICM is getting 12 volts. Disconnect the ICM wiring harness & see if you have 12 volts at pink/black (pink some years) wire with the key on.

All of the fuses look good.
No spark on the three front cylinders. I disconnected the ICM harness, but I can't find my meter! I'll grab my Fluke from work and check it Tuesday pm...

Thanks!

Also, it doesn't have any stored codes (12 12).

What I'm still pondering is the fact that it drove fine and it wasn't until the next day/start that it revealed a problem.

If I'm not mistaken, the vehicle can't run with a bad ICM or Crankshaft PS, but it could run with a bad Camshaft PS, as long as the sensor was ok when it last started.

But, if the Camshaft PS goes bad, I would expect a code to be stored (synchronous or similar).

FYI, the ignition control module is receiving 12.03 volts.

And it only gets more interesting...

I reconnected the ICM last night. This morning, it was below freezing; the car started right up. It's been ~2 weeks since it last started...

So, I'll assume that either there was some corrosion on the ICM connector that got jiggled loose or there is an electrical component that when it's cold enough it contracts and functions as it should.