1993 Dodge Ram misfire

120,000 MILES • V8 • 4WD • AUTOMATIC
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MRSEERIOUS
  • MEMBER
  • 1 POST
when im driving after the engine warms up, i have a fairly inconsistant misifire.
ive changed the plugs wires dist cap rotor ignition coil and the mis continues.
do you think this is a fuel issue? there is no loss of power and this only seems to happen when im cruising whether at 70 or 25.
i also cant seem to locate the egr valve, i think it has been removed previous to my ownership.
ive traced the vacuum lines, and they seem to be correct.

i dont know what it could be at this point.
thanks guys lemme know
Apr 29, 2009 at 9:07 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
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.
Apr 29, 2009 at 9:52 AM
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