dkpippin777

i recently got a 91 chevy s10 blazer from a relative. when you let it idle its ok, but when you try to drive it it starts to backfire and sputter in the intake. it has a TBI automatic 4x4 vin #z . when you give it alot of pedal it runs good but if you let off and try to just cruise then it starts to backfire. ive checked the tps,vaccum lines. ive taken the egr off and cleaned it, seems to have problems, no codes came up so far unless i unplug something. i've seen some comments on here about a ground issue? is it possible that this would cause this to happen.i even went as far as checking all the lifters and clearance cause my uncle was told by some wannabe mechanic that they were stickiing ( i didnt think it was possible but i checked all of them anyway). the timing was checked ,new plugs etc. im very good at repairing things but got stumped when it came to this. my book says to check egr and or the ECM. can anyone help me. ill check whatever i need to fix this thing. its a very nice rig. please help me.. if you want to contact me by email use [email]dkpippin777@yahoo.com. thnx dwayne