2002 S-10 Runs rough (sometimes)

[bigwheelz1728]

Ok heres the scoop 2002 S-10 4.3 was sitting for awhile (month maybe) started very hard and would hardly idle and was misfiring and running very rough. Decided a tune up wouldnt hurt put on new plugs, wires, cap, and rotor it then ran great for a couple weeks then one day wouldnt hardly start and running very rough my mom was driving it at the time she took it in they said it had the wrong spark plug boot on one of the cylinders they swapped it out it ran great......for awhile then it sat for awhile again same thing running very rough. I belive every time the battery was dead after sitting and had to be jumped. After

[danielsatur]

How old is the battery? if original replace.
An old battery puts too much of a demand on the alternator which in turn will burn it up.

Your Truck has Computers, control modules, electronic sensors, an electric fuel pump, that needs a good battery.

[bigwheelz1728]

Battery is less than 2 years old

[danielsatur]

In the morng keep bells & whistles off until normal operating temp, this will give charging time for the alternator todo it's job. When you arrive to your distination turn bells & whistles off, this will buy a little more charging time.

If you still have a problem with battery going dead, some circuits are connected to the BAT signal & could cause a short to drain your battery.

[bigwheelz1728]

Ok heres the latest figured out it is missing on numbers 4 and 6. Tried the old piece of paper up to the exhaust trick since these cylinders are neighbors and it is sucking in the paper. ANy suggestions before I tear this thing down??