Last try to solve this issue! ( So far 0 for 1000)

[BC69]

Okay, so I am sure if you research my old posts I have brought this up 15 times. But it is still persistent, and a huge headache at times.

Problem: Basically, since the car was completed, it randomly will not start. Pull in to get gas, won't restart. Stop for food, won't restart. It doesn't turn over or anything. Just completely battery dead. Battery gauge while driving (and I check constantly now) is right at 14. But when you go to start, seems to be down to 8, like something is bleeding the battery.

Fix AttemptsFirst time it happened, my shop changed a couple wiring harnesses, even though they had all been brand new. And ultimately believed it was the neutral safety switch on the transmission. But I don't believe that anymore.

Since then, if it happens, generally the car will start after a jump, or if you just let it sit sometimes it will start. Which makes me think it could be heat related. But this has happened 2 minutes into driving or 2 hours. So while I still think it could be heat, how would that drain the battery? I can see heat impacting the starter, but the battery?

The starter and battery are both brand new. Engine is 350 with 3 speed auto. Harnesses are all new. Alternator is a bit older, but has been tested and is fine.

Right now my car is in storage at a mechanic's house, he has tried to get the car to duplicate this non-start issue, but never can. What is funny is he will let it run for a while to heat up, cruise neighborhood and see if it will not start. No luck. I will take the car out, drive 1/2 mile to the gas station, and it will die!

This is seriously frustrating and its been to the shop a few times, but I think to diagnostically figure it out would need some luck, getting the car to do it, or a random electrical system hunt which could cost a bundle.

So once again, I ask for some ideas on what could be causing this? Free beer to anyone who can solve it!

Thanks,
Tim