stumbling

So I was having some issues with my 93 explorer 4x4.no egr.felt like it was stumbling or dragging.loss of power.honestly I thought the exhaust was choked up or fuel pump was going.i started with the air filter and throttle body.air filter was dirty as hell but looked ok will replace.cleaned the...

Hi all, I just completed a engine replacement on my 02 Ford Explorer XLT 4.0. Runs and drives great when cold, but once it warms up a couple different codes pop up. When they appear, the engine stumbles when idling to the point that it kills itself. Occasionally, it will hesitate and stumble...