Called diablosport and looks like I have to get the PCM reflashed

Left the charger on all night, it read 'full' in the morning, tried to start - nothing.

I checked all the fuses before, no problems there...

Youtubing/googling how to check my starter relay and motor, but I doubt one of those just gave out, like the battery... for some reason I think its some ...

Well I dont have a digital multimeter, but I have an intelligent battery charger that displays volts and amps. When I connected it, volts were 12.8, and when trying to start, dropped to 12.6 (assuming because the custom HID headlights I have which are hooked up to the ignition go off when trying to ...

ahh ok, I understand. checked the prongs, all good. yeah key is in on position when it can't communicate... so looks like I'll go with the battery for now and update you guys.

thanks for all the help so far, much appreciated!

Also, my radio, headlights, dash lights etc. all work to what appears to be full power. And my 7137 says 'unable to communicate with PCM'...

K will get it tested... just don't understand why all the sudden (if it is the battery) it gave out? I just came back from a 3,000 km camping trip and it held up just fine. Had the ignition on for all of 10-20 mins while I was changing the tune.

I tried yeah, I have a Trojan battery I use for an elec trolling motor that I keep charged/tended 24/7, and it didnt make a diff when I hooked it up to jump. battery gauge is fine as well. Maybe I'll try leaving them connected for a while...

Darn, was supposed to get bumpers installed monday ...

So long story short, I recently got long tube headers (to add to catback exhaust, throttle body spacer, CAI) and was throwing a 'running too lean' check engine light. Wanted to restore back to stock tune and see if that helped, and eventually get a custom tune done.

So with difficulty, I did manage ...