Okay guys, I'm here as a last resort. Normally i figure out problems with my vehicles pretty quickly but this yukon has me so stumped its not funny (my area of expertise is volvos)
My truck has been acting up really badly. When i first start it up and go right away, it seems to stumble on its self, Then quickly subsides and drives some-what regular. Except! If i goose the gas pedal a little more than casually it does the same thing. It will rev and be all "LETS GOOOOOO!!" but it starts stumbling and falling on its fast while i maintain whatever speed i'm at. If i floor the pedal it will sputter? and get moving then sputter even harder and then get moving over and over.
Well today... heh.. I was coming home and was driving an little extra rough on it, when i got off the highway and stopped at a stop sign, and went to pull off, the truck wouldn't move, sputtering, rev'ing, sounded like it was misfiring left and right, wouldn't go any faster than 10-15 mph (limp mode anyone?) and the check engine like flashed at me for a little while (seeming to say "What the heck is going on with me!!!" lol.
Now before anyone says its spark, I replaced all wiring, plugs, rotor/dist. I did the fuel pump, fuel filter (that was against my idea, but my garage said it was probably that) and the throttle position sensor. Anyone able to aid me in the right direction? I'm at a loss and even asked the mechanic to drop an I-beam on it already lol.
PS. 4wd and 2wd does in deed work, engage, and disengage like its suppose to. And i did sit in the truck (with it in park) and gunned the engine. It seems like theres something causing it just to misfire at 3200rpms to 4000 (and yes, 3200, i watched the gauge and all the way up to a hair or so above the 3k mark its fine.
Oh it threw that following codes P0131 P0151 P0171 P0174 P0300 First two are low voltage? to O2 sensor, middle 2 are lean codes, and last is multi misfire. Someone please help >.<
My truck has been acting up really badly. When i first start it up and go right away, it seems to stumble on its self, Then quickly subsides and drives some-what regular. Except! If i goose the gas pedal a little more than casually it does the same thing. It will rev and be all "LETS GOOOOOO!!" but it starts stumbling and falling on its fast while i maintain whatever speed i'm at. If i floor the pedal it will sputter? and get moving then sputter even harder and then get moving over and over.
Well today... heh.. I was coming home and was driving an little extra rough on it, when i got off the highway and stopped at a stop sign, and went to pull off, the truck wouldn't move, sputtering, rev'ing, sounded like it was misfiring left and right, wouldn't go any faster than 10-15 mph (limp mode anyone?) and the check engine like flashed at me for a little while (seeming to say "What the heck is going on with me!!!" lol.
Now before anyone says its spark, I replaced all wiring, plugs, rotor/dist. I did the fuel pump, fuel filter (that was against my idea, but my garage said it was probably that) and the throttle position sensor. Anyone able to aid me in the right direction? I'm at a loss and even asked the mechanic to drop an I-beam on it already lol.
PS. 4wd and 2wd does in deed work, engage, and disengage like its suppose to. And i did sit in the truck (with it in park) and gunned the engine. It seems like theres something causing it just to misfire at 3200rpms to 4000 (and yes, 3200, i watched the gauge and all the way up to a hair or so above the 3k mark its fine.
Oh it threw that following codes P0131 P0151 P0171 P0174 P0300 First two are low voltage? to O2 sensor, middle 2 are lean codes, and last is multi misfire. Someone please help >.<