My 1991 olds cutlass ciera with a 3300 engine is very hard to start whem cold or wet first thing in the morning. Once started it will start and run well all day

SOURCE: Audi 80e 1991 hard starting when cold

I've owned the same car. Check that the fuel relay 'primes' the system before you start the car. When you turn the key to the on position (all you dash lights, ready to start) you should hear the fuel pump run for a second or two. If it doesn't run you can replace the relay for about $30. If the relay is not the problem, it may be a check valve within the fuel line to the engine. This valve keeps fuel from draining back to the tank when the car is sitting. That way, there is fuel close to the motor when it's time to start. The temp senor was not a bad shot, they were thinking it was bad sensor not telling the cold start injector to run. Obviously not the case. However, the injector itself may be faulty in some way. As long as the car always starts, it's one of these problems, assuming the ignition system and engine mechanicals are in running order.  good luck. JK

SOURCE: Replace thermostat on 1990 cutlass ciera

the easy way to find this is to fallow your bottom raditor hose to the engine where it attaches is called the thermostat housing remove the hose and remove the four bolts then take out the thermostat replace it and re install don't for get your antifreez you will need to replace it do to the loss when you remove the hose

SOURCE: 92 cutlass ciera not starting

Sounds like it could be the fuel pump or injectors.

SOURCE: 1991 olds wont start

I have no spark. Changed the CSS and still no spark. I also changed the Coil packs with a junk yard 1. Does anything else control spark other then ECM?
Thanks

SOURCE: 1991 Cutlass Ciera 3.3 low idle

Idle Control Solinoid Will Cause this with No Engine Light. = ICS