Please help Everything started with a P0401 code EGR Insufficient flow EGR passes were clean up and being a 20 year old unit it was change , then it was the DPFE sensor also 20 years old it was change the EGR valve control was also change And the EGR Valve pressure was also replace all with motorcraft parts

Since the Van has 200K lower and upper intake manifold gasket , Head valve was clean and refreshed the engine (new gasket ) All EGR ports were cleaned up. Now I Have a rough idle. Thinking the IAC valve was probably the isse I changed it too , but the problem persist.all spark plugs are new as well the cables in it. also i have a p1504 still .

 

Ever occur to you we'd maybe need the year, engine size, fuel type----ya know important things like that?

 

I apologize is a 2000 Ford e150 4.2 v6 aspire gas engine today I did a voltage test on,the ica conector since that is what my code seems to be p1504 voltage was on the normal range and so the ♎ .my next step will be checking for air leaks going to build a smoke machine and see if i found something.