My 96 S-10 with a 2.2 started bucking and sometimes I'll even hear a little
back fire , can't tell if it's back firing out the intake or exhaust though.
Runs fine until about 3rd. gear and then it starts acting up . Computers not
throwing any codes . I'm thinking fuel pump, fuel injector maybe even plug
wires . Changed fuel filter , no difference. Thought maybe some one out
there had a similar problem and could help me narrow it down..  Thanks.....