Listen fore the fuel pump when at each stage of the key turn.
Its one of the least thought of problems the fuel pump.
check the crankshaft sensor first.
SOURCE: car won't start put in new battery but still won't start cranks real good.
Is there a check engine light on? Did car crank with old battery or you just replaced to see if would start?
SOURCE: cranks but won't start sometimes.
From what i've seen over the years with the Chryslers i've encountered. Your describing to the "T" what appears to be a bad Crank Sensor. I will bet money that if you replace the crank sensor it will solve your problem. BUT...Also know that a bad fuel pump can do exactly what you describe in your statement. Once the pump get hot it gets to acting stupid, but yet again so can the Crank Sensor. Still, my money is on the Crank Sensor.
SOURCE: 2005 pt cruiser won't start won't crank, everything works
When you turn the key on the ASD relay should turn on the fuel pump and power the injector, Do this lets cheat the system go to the ASD rely open the cover expose the inside have some one turn the key on does the ASD make contact? If not turn the key on collpase the ASD so it make contact do you hear the fuel pump come on? Now try this just as how you iopen the ASD do the same to the starter relay. Put the car in gear e brake on someone in the vehicle in case the car start and you are in front of it and it runs you over so at least they step on the brakes. Key on ASD exposed as your collapse the starter relay does the ASD relay turn on? Here why if you can control all the relay from under the hood you will need a ignition switch (the eletrical part)
Check the fuel line pressure it may be low should be 55lbs
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