dodge ram 1998 v6 3.9

Fitted new cap leads plugs good compression no fault code is comeing up.Do you have problems with the heads cracking like the 360s cin.Because i have
a missfire underload which i can not get rid of.Electrical seems fine.Compression is good good oil pressure.Also fitted new oxygen sensors any ideas will be greatful thanks xx
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Maybe look at the throttle sensor.
I had one go out and the truck would hesitate and have trouble running when I gave it a lot of gas.

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