Loping at idle/NO throttle response at all
 

I have a 2002 lb7 with 170,000 miles on it. During college I leave my truck at home and it is lucky to get driven once in two to three weeks. The batteries have died probably about three times now and this time after jumping the truck I started it up and it sounded like a hard start at first. It continued to lope and did not change after five minutes. Tried to press the pedal a little to see if it would pick up and the throttle has no effect at all. A "reduced engine power" message came on the message center. Could this just be from the batteries or what is the problem??

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