2002 Chevrolet Cavalier No spark and No fuel

Forget the fuel pump. That had better not be running unless the engine is rotating. Look for the cause of the no spark. That's not going to be an ignition system problem when you couple it with the dead fuel system. What they both have in common is being turned on by the Engine Computer when it sees the engine rotating, and it knows that by the signals from the camshaft position sensor and the crankshaft position sensor.

The place to start is by reading the stored diagnostic fault codes. If there's one related to one of those sensors, that's the circuit that needs to be diagnosed further. The actual sensor is the cause of the problem about half of the time. There can also be wiring and connector problems to consider.

Replacing the Engine Computer as a guess erased all the valuable information stored in it, and some fault codes won't set again just from cranking the engine. If there are no fault codes, you'll need a scanner to view live data to see if one of those signals is missing.

I will check out those sensors. But you still should hear the fuel pump kick on when you first turn the key on...right? I had no codes in the old pcm.

Typically the fuel pump will run for one second when you turn on the ignition switch, and GM pumps are pretty noisy and easy to hear, but I wouldn't rely on that for a diagnosis. Get the spark back and I'll bet the fuel pump is back to normal too.

I took it into the mechanic and I had a broken power wire that goes to the pcm.

Dandy. Happy to hear it's solved.

I know this post is years old but which wire was it?

Broken wires rarely occur on their own so don't expect to see the same thing on a second car. Instead, the proper way to diagnose a problem related to a computer or an integrated circuit is to check all the voltage feed circuits, then all the ground circuits. Nothing can work when any one of them is missing.

What I would suggest is to start a new question specific to your car, and please be sure to list the engine size and mileage. We use that information to know which of multiple systems are used and when making generalizations as to the best suspects. This was a private conversation between two people, and as such, none of the other experts are going to see your addition or have a chance to reply. That may not get you the help you need.

Also be sure to list the specific symptoms, what led up to the problem, what you've checked already, and the results. That will help narrow down the replies and get the diagnosis going faster.

Here's the link to post your new question:

https://www.2carpros.com/questions/new