Car won't start.

Compression ok
did you hear the fuel pump
while cranking
sparks !
key light on dash off

Does the engine crank, but not start or will it not crank?

If not cranking, test battery, clean post and check wires for corrosion and good contact. Also check the ground wire between the engine block and the car body for good contact. If all good there, may be a problem in the ignition switch.

If the engine cranks but will not start, check the pressure on the fuel rail. If good pressure, check the ignition module.

cranks, ok
(ill pretend engine is good, in real life, never)
check spark next.
ever check spark, same way for 100 years , 1zillion google hits.
gas engines.
that is step one, check all cylinder for best answers.
one dead is totally different than ALL DEAD.
, if spark is bad.
use any scan tool to see why , crank for 5seconds release key
and BAM< there is a clue. !!!!
in RPM is good, cranking and CMP and CKP are happy then
that IS ANOTHER CLUE>
EVIDENCE.

You shouldn't have any gas smells, maybe a little if the engine were cranking over without starting. But your car is not even cranking, right? Or will it crank and not start? In that case you might smell a little gas, so next step would be to check for spark.

The leak on front passenger side: if that is where the front of the engine is, check carefully your water pump for leaking (then it is bad) and also check all hose connections there for leaks.

Sudden no-start conditions are usually loss of either spark or gas to the cylinders. These are the first things to check when it won't start.

The first thing I'd suspect would be the distributor cap & rotor, but my 2003 PT Cruiser manual says:

1 - Inspect Fuel Injector Pressure Regulator --- Faulty Fuel Injector Pressure Regulator.
2 - Inspect Carburetor Float --- Faulty Choke Float.
3 - Inspect Choke Pulloff --- Faulty Choke Pulloff.
4 - Inspect Choke Thermostat --- Stuck or Improperly Functioning Choke Thermostat.
5 - Inspect Fuel Injector Cold Start Valve --- Damaged or Faulty Cold Start Valve.
6 - Inspect Spark Plugs --- Fouled Spark Plugs.
7 - Inspect Relay - Fuel Pump --- Faulty Fuel Pump Relay.
8 - Inspect PCV Valve --- Plugged or Damaged PCV Valve.
9 - Inspect Carburetor --- Choke Not Operating.

Make sure battery has a full charge. Have a helper crank it, while you visually check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure. Also, check fuel injector pulse.

Check for spark and fuel.

Is it a Chrysler 2001 PT Cruiser or a 2004 Chrysler PT Cruiser?

CAR WILL NOT START?
There are some possibilities which you will have to check in this case:--
1) First of all check the power and voltage to the battery. With meter it will show exact 12 volt if the battery is charged. If the voltage is less get the battery charged at local auto repair shop. If the battery is internally drained and not getting charged then its time to replace the battery.
2) When you crank the car do you see spark coming at the spark plug? If no then its time to check the spark plugs and coil pack. If the spark plugs are not worn out and looks new then its time to check coil pack. The spark plug gets power to spark from coil pack.
3) The other thing to check in this case is the starter solenoid of the car. If the battery is charged and you start the car then it gives power to the starter to start the car. But if starter is faulty or not connected properly then car will not start.
4) The other thing to check in this case is fuel in the car. If there is fuel in the car then check the blockages in the fuel pump if the fuel pump looks proper then check the fuel filter above the fuel pump.
5) If all the above possibilities mentioned above checked out OK/perfect then it’s a electrical issue and the wiring's in the car needs to be checked. The car gets power from the battery to get started. so the wires from battery needs to be checked one by one.
Thanks. Keep updated for any more query. You can rate this solution and show your appreciation.

Crank sensor controls fuel not sprark. Check the cam sensor, this sensor is usually on the head of the engine. Check for this sensor on the top left or right sides of the engine (it depends if turbo/none turbo). Another issue that may cause no spark is failed ignition coil. The ignition coil is on top of the engine, with 4 wires routing to the spark plugs. Hopefully this helps!!

check the battery and make sure it has a fully charge,also check to make sure the start motor pinion is not jammed in the flywheel, and check the coil pack to make sure have spark.also check the crank sensor