Hi there guys I got a question to ask. For some strange reason my car has the habbit to not start at random times. I got a 93 civic si (canada) (stock engine). Ill explain you more. One day (a month ago) I was on my way to school and was going to start the car but she didnt want to. I tought it was a dead battery but i could hear the fuel pump priming and there was spark. I even called my friend for a boost. The main relay clicked three times as supposed to. Unfortunately at the time i didnt check the fuses kuz i didnt know how to. I still dont know. I was frustrated and call the mechanic. He took it for a while and said it was fine. I was surprised but didnt care.

Now yesterday I was on my way out and my car didnt wanna start again. I got pretty mad kuz it was the same thing again. It was cranking but not starting. I tried everthing i could and nothing still. I thought i had fludded so i waitted 30 min and still nothing. then I called my friend and told me to reset the ecu. I disconnected the ground for the battery for like 15 secs, connected back in and then she was running again. So i was like "O so i just needed to reset the ecu". Now today the same thing happened. I disconnected the battery again for like 15secs but still didnt want to start. Then i disconnected it for like 10 min and she started like a champ.

Does anyone know what is exactly happening here. My mechanic checked the timing belt and it was fine. I dont know what is exactly wrong with this. Seems to be something electrical.

I would appreciate some advices as winter is coming and dont want to be struggling with this in shitty weather.

Would it be a faulty ECU? If so why would it work after I reset it? I havent checked for codes either as the CEL hasnt come on besides when i start the car.

Thanks, Luis

 

random no starts sounds like ou ae a bad ground. check all the ground wiring and replace any that is frayed corroded or just plain damaged. There is no need to buy an aftermarket wire ground kit just make your own. Ground wires to check are on the alt bracket to core support, pass side inner fender to trans, and I think there is on the thermostat housing but cant remember.