hey how are you
I m sorry about the issue you are having with it
1- since you are stranded and maybe no tools to check, the most common problem will be CKP (Crank Shaft Position sensor )
we need fuel & spark to start , so we need to know what you missing fuel or spark or both
2- when you turn the switch from off to on fuel pump should come on for few secs , does it ,you can hear it buzz under the car ?
3- if the fuel pump coming on ,means we missing spark , control module , ignition coil , ckp sensor will cause that , but since fuel pump & module is new I m going to assume the ckp is bad and intermittently not sending a signal to control module and no spark no start at times .
4- if you want the circuit diagram and you want to test and know how , i can send it for you , but that will be the most possible cause based on what you told me on it
5- i sent you a picture showing the ckp sensor on the car
Please let me know
ASE Certified Technician