accleration problem

hi, I have a 99 s-10 blazer and need help trying to locate the problem, the truck will start and idel just fine but when i try to acclerate it want to bog down it wont kill or stall but it has no
power and doesnt move. i had one guy tell me it could be mass air flow sensor or fuel injector sensors. i have already replaced spark plug, plug wires, fuel pump, fuel filter, and fuel relay. i have had good luck on here befor so i wanted to see what people say thank you.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

wow-fuel pump, hope that was needed. If you or someone can, one of the things I would consider is removing the oxygen sensor in front(engine side) of the cat. convertor. It'll sound like a Mack truck but if this makes it better I would suspect a plugged cat. convertor. How many miles on this Blazer? Mass air flow sensor is a possibility-there are many threads out there on how to clean it. Good luck. JP
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.