My bf's car has trouble starting once in a while (maybe about once in a few weeks). It seems to happen after it rains or after a wash, but it's not 100% either.

Before starting, the lights, windshield wipers, and radio all work. Basically, when you turn the key, it won't make any noise. If you jumpstart it with a car, it'll start (but not with a portable jumpstart pack). But the battery, starter, and main relay are all new. I was wondering if it could be the starter since it was purchased from NAPA and they used rebuilt parts. We also read that it could be a bad ignition switch, but I thought that if it's able to be jumpstarted, the ignition switch would be okay.

What might be causing this?

Jean

 

it's probably not the alternator but anyways turn the car on and the take of the wire of the battery and see if the car will stay on. anything other than that then i dont know unless you didnt tighten the battery wire all the way.