Never done one of these posts and not too much of a mechanic but know the basic so bear with me, yesterday morning my truck wasn't starting and at first I thought my batteries were dieng so I had them tested and all good, came back and put my batteries in and truck fired up and died about 30 seconds later. Then my truck threw a code that fuel rail pressure was too low so I ordered fuel filters and they are on the way. I turned my key about 6 times like I had just put new filters in and my truck ran fine the rest of day. Now today my truck is just doing one single click when I try to start it and saying service advancetrac on my dash. When I turn the key my glow plug light is not showing up on the dash. I was thinking my pcm may be bad or something but I have no idea. Please help!

 

Truck details? Year, engine?
What codes are being thrown?

 

2011 f250 6.7 P008A P0000 there was another code but I can't remember what it was and now my tuner won't communicate with my truck at all so I haven't been able to check the codes again

 

So the truck is tuned? This is kind of critical information. I would try returning the truck to stock on the tuner first. Do not attempt to start. Then reload the tune on the truck and see what happens. Sounds like your batteries are going. Weird they tested alright. What voltage are you getting when you try and crank?

 

Oh snap, I missed the part where you said your tuner won't communicate with the truck. What kind of tuner? Tunes? Have you tried unplugging the tuner and plugging it back in? Yes, I'm serious. I've had bad cords on tuners and a new cord solves all sorts of issues.

 

It's a bully dog, the cord for it is a little wore out so that could be an issue

 

I think that just uses an HDMI cord. Try swapping the cord.

 

Will probably end up taking it to local mechanic tomorrow just didn't know if it sounded like there was anything small I could be missing. Glow plug light isn't popping up so I thought for sure it had to be something to do with pcm so I have a new pcm relay showing up in the morning

 

Ok I'll try that

 

If your tuner isn't communicating properly, your windows could go up or down with your turn signal, not kidding. It can also brick a computer easily.

 

New cord still nothing, no check engine light. Just one click from passenger side when trying to start

 

Above and beside the parking brake pedal assembly (driver's side kick panel under the dash), there is a giant plug with a large grey locking lever on it. Locate the plug, and carefully release the grey lever, squeeze the two sides of the plug back together, then re-latch the grey lever.