Block every single one off, I could tell you exactly what each goes to and what it is but no need, simply block them off of the parts that are not removed, there is no plumb one to another or anything like that.

'...connects to a plastic thing right next to the dpfe. Not sure what it’s called.'

EGR vacuum regulator...........the two smaller metal lines you mention are exhaust gas high and low, there is a washer in between the two in the bigger metal pipe; it has a small hole in it. One small line then gets full exhaust pressure as a reference point and the other gets exhaust pressure modified by intake vacuum and the restriction of the washer on the other side.

 

Thank you ! That was plan A . And to see how it ran lol cheers

 

did you end up taking the pipe that runs from the catalytic converter to the egr valve off? slash if you did did you plug the threaded npt fitting?

 

Ford often uses a fitting there that is neither NPT or a common one you can find anywhere, it is a bastard one to prevent easy plugging of it.

 

Hey y’all these 2 lines are disconnected in mine and it’s running like shit, when I put the lines back on it runs worse, any idea if it’s bypassed deleted? How to tell? There’s still exhaust coming in and out

 

You have to clearly say WHICH 2 as there are 4 and different things happening on each one. Year model and engine type matter too.

 

Is the 2 lines coming from the pressure sensor to the egr pipe, it’s a 2003 focus zx3, with a header, intake and exhaust

 

A delete has you plug both of those but you will always get a code doing it.

Blocking EGR may lower power as the EGR on allows more timing advance and the computer figures that in. With no EGR timing should drop slightly as the knock sensor works more but you may still get some pinging.