1997 Dodge Ram misfire

1997 DODGE RAM
157,000 MILES • V8 • 4WD • AUTOMATIC
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CHARGER06
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my 97 ram pickup has a misfire, and i get code P0306. i changed plugs, wires, cap, rotor, rerouted plug wires in accordance with dodge tsb, swapped cyl # injector with cyl # injector, but stil have the number 6 miss throughout rpm range. it isnt 100% of the time, engine runs smooth a mile or so, then bucks and shudders, chk engine pops on, engine smooths out for a mile or so, then starts missing and bucking again, etc, etc. i check the codes, and its P0306 cyl #6 misfire. i do get a very occassional P0300, multiple cyl miss, but i get the #6 misfire code every mile.
Jan 28, 2010 at 3:12 PM
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RASMATAZ
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Check no.6 cylinder compression.

Engine misfiring can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.
Jan 28, 2010 at 3:17 PM
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