I have a 200 S-10 when you give it gas it just falls on its face no power misses bad, Codes said rich or lean run on both banks, replaced fuel pump,fuel spider, and checked converter and it did not solve problem checked distributer changed fuel filter about a month back. can't figure it out. can anybody help? It has a vortech 4.3L engine,engine code X two door pick up automatic transmission. Had codes checked and it is no longer giving codes sinse I replaced parts. It all started when a garage told me my spider was bad, The fuel pump would not hold pressure on test so all the stuff I replaced needed to be replaced I think.

 

had a similar problem with a 2000 s10 the spider went and replaced that, after it keeped falling on its face, ended up a plug was cracked the one behind the steering shaft go figure, suggest doing plugs and wires