Ok Initially I had no clue where to start, I was going to leave for work, My '99 durango would start fine but had to hold gas peddle down to keep running, or it'ld stall. I had no time to really look at anything. I thought about problem all day at work, Trying to figure out where to start. the only thing that caught my eye was that the battery charge was lower than normal..., anyway, get home, (10 hours later), to start into it, Battery is completly drained. What drained my Battery? I'm sure thats the problem. What are tips & tricks for testing what part might be bad. I am very competent at repairs only problem is I do them by trial & error, trying to "find" the problem, I don't have THAT kind of time right now I need it fixed yesterday, I need a direction, & confirmation of my Haunches. PLEASE help, Am new to forum BTW

 

Check the battery itself, it may be bad? If not, check your alternator. It may not be charging the battery thus, when driving your D, you eventually drain your battery.

 

Sounds like a alternator. Replace both the alt. and battery.

I perfer Auto Zone but each to there own.