What would cause a 1991 Buick Park Avenue not to start when the engine is cold?
check crank sensor
== == I do believe if you hear a knocking noise that your crank shaft could be failing. Which means you will need a new engine. Have it checked out. Replace the harmonic balancer they will make a bad knocking noise. When you start it and the oil light goes out and it knocks, this is what is wrong with it.
Having a problem with your 1989 buick park avenue shutting down while driving then will start back up if it sits a minute?
What would cause my 1998 buick park avenue to start then shuts off after 15 minutes and wont start again?
I have a 92 PA and had to replace the crank and cam sensors. Either will cause the same result. The error code will determine which is bad. The car will run, but as the engine heats up, the engine will die. It will start again after it cools off. The computer needs both signals to know when to send a fire signal to the correct spark plug.