Help car wont start

#1
Hello i have been having a problem with my 04 corolla. Car will crank but not start. I tried removing the alarm but still wont start. Engine will turn to start but no ignition. This has happened a few time and some times i fixed it by removing an reinstalling a relay. But i replaced it this time and still wont start. What should i look for? I had a friend come by and he says its either the crank sensor or ecm. Not sure tho. Any help on this is appreciated.
 
#2
Looks like you said you replaced that relay on the positive battery terminal. I would check it with a tester to make sure it’s still getting power past that relay. This has happened to me before and it was that relay rusted out
 
#3
I take that back. Mine wouldn’t crank at all when I had that issue. That’s a tough call. Did you do anything to that car before this problem or was it doing anything to warn you?
 
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