engine hesitation / stumble when i hit the gas

[rodneysimpson85]

2002 suburban 5.3 v8, 153000 miles runs great except for when I hit the paedal from dead stop it stumbles really bad then picks up and go, I changes plugs and wires, new air intake system, new MAF, tps, cleaned iac, cleaned intake , new knock sensors, new gaskets, new flow master muffler,...there are no engine codes, also new oil and filer, also new gas filter and the fuel pump is good, 55 with key on and engine running 61psi....man I don't know what else to do....just came back from a road trip to Austin tx back to dallas to maybe blow out the motor....no luck

 

[ccapehartusarmyINF.(ret)]

when did this start before or after you installed the aftermarket intake
if you have the old factory intake put that back on real quick see if fixes the problem
sometimes these aftermarket intakes can lean out yer mix
its not the fuel pump i have a 2002 also and when mine was going out it almost never started on the first turn of the ignition

 

[rodneysimpson85]

Man you know something your right..... my truck ran great before I put this damn. bully dog cold air intake on ... thanks chris.