I have a 98 Cadillac Catera that I got for my wife. We got the car home with no problems. The next day we try to Start the car and got nothing. It will crank but it does not start. I have change the Crank sensor and the ignition module... I have not spark. I do have good fuel pressure. It cranks but still not starting... What else can I do...

. Check all underdash and underhood fuses with a test light or multimeter.

. Check coil.

I checked all the fuses in the car.
I even change most of the relays.
That was the first step I took before I started changing anything else..
Please help...

When was the last time you changed the timing belt? Have you checked to make sure it hasn't broken or skipped a few teeth?

To be honest, I would not even no where to start to check the timing belt.
This is my first time working on a Cadi Catera.

Check for codes.

Check for codes.

The car does not show any codes...

When was the last time you changed the timing belt? Have you checked to make sure it hasn't broken or skipped a few teeth?

To be honest, I would not even no where to start to check the timing belt.
This is my first time working on a Cadi Catera.

. Clean main ECM ground.

. Check coil wiring and coil interface module.

. Check for ECM failure. The ICM-function is resident in the ECM.

. Clean main ECM ground.

. Check coil wiring and coil interface module.

. Check for ECM failure. The ICM-function is resident in the ECM.

I just change the ECM with another one.
It has the same part number.
Still no spark..
No codes
Not working
Please help

Did you replace the coil pack? On this generation vehicle, ECM, Crankshaft Position Sensor, and coils are the normal culprits of "crank but won't start" situations.

Did you replace the coil pack? On this generation vehicle, ECM, Crankshaft Position Sensor, and coils are the normal culprits of "crank but won't start" situations.

Yes, I got a new one at the autopar store.
Along with the crank position sensor.

If all components are new, do you have power to the coil? If not, the ignition switch may be bad. Check for wear, pitting, or melting.