Got a 2.0l pinto efi sierra, it will just about idle but wont rev out cleanly with out a few miss an back firing, first of all it seemed like it was miss firing so new plugs leads cap an a rotor arm was replaced know seems like it has a fuel starvation problem, it is gettin fuel past the fuel filter on the pass inner wing, anyone had a simillar problem?

 

Is the timing adjustable ?, if so check that first.
tabetha