engine sputters and misfires while driving on 1996 GMC Yukon

just started happening i have changes the spark pllugs, wires, and ignition coil engine is sputtering and misfiring

by in Somerville, OH on March 25, 2011
2 answers
ANSWER by , March 25, 2011
ANSWER by , March 25, 2011
try to check the fuel pressure it should go up 5 - 10 psi when reving up if not fuel pump is bad