1998 Dodge Ram 1500 V6 3.9L Misfire?

1998 Dodge Ram 1500 cargo van V6 3.9L 122K Check engine light came up and codes shown are P0300 random misfire detected P0302 cylinder 2 misfire detected P0304 cylinder 3 misfire detected I already changed spark plugs, also ignition wires and still the same codes show up again, what can be the cause... show more 1998 Dodge Ram 1500 cargo van V6 3.9L 122K

Check engine light came up and codes shown are

P0300 random misfire detected
P0302 cylinder 2 misfire detected
P0304 cylinder 3 misfire detected

I already changed spark plugs, also ignition wires
and still the same codes show up again, what can
be the cause please help me....
Update: i already clear the codes 2 times,
test drove the van, 15 miles and
then when i shut of and started again,
the check engine light showed up also i checked the codes and they were still the same
6 answers 6