'92 B2600I pickup needs help

lvfs

Member
:
B2600 I, 1992 pickup 4x4
this truck runs great except when it decides to only run 1500 rpms, sometimes for days, sometimes till next start up.has new fuel pump and filter,new plugs,wires,cap. anyone ever heard of this? Please help!
LVFS@ev1.net
 
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