97 4.6
So it would appear that I have the wild goose chase of codes. The major symptoms are rough idle and very poor performance.
I started off by cleaning the egr valve and ports. Then I checked the egr valve itself and watched the valve open and close under a vacuum. I was suspecting the DPFE sensor but I wanted to trying something else first. I was under the Impression that if at idle you apply a vacuum to the egr valve it would cause the engine to "stumble and stall". I did this and there was no change in the way the engine was running. So now I'm lost as to where to go from here.

 

Perhaps the port in the throttle body or intake manifold where the EGR dumps exhaust into the intake is plugged with carbon. Might want to pull the throttle body of and check/clean the port.

 

Yeah I cleaned the inside of the throttle body, as a matter of fact (due to my horrible luck) I tore the hose on the back of the throttle body tying to get it off. Any idea off the top of your head what I goes to lol. To dark to chase down

 

Never mind, it's the pcv hose