I dont think Magnums have a EGR (beer keg intake)
The early ones did and i just fixed one doing exactly this by putting a block off plate under it. It was in a van so very easy to see the pintle move, just the very slightest throttle movement and the valve would open all the way up.
Unfortunately on my W150, it is right against the firewall and very difficult to access
To diagnose whether the EGR on 1992-1995 Magnums is causing your stumble
you can also disconnect and block the steel EGR tubing that runs over to and connects to the exhaust manifold.
Considering the age and rust of that tube connection,
it might be quicker and easier to just cut the tube
then repair it afterwards with a sleeve or two new fittings.
I have been thinking of experimenting with a “cooled EGR modification:
Using ten feet of corrosion resistant CuNiFer tubing to pick up exhaust gas way back behind the muffler.
The exhaust gas cools in the exhaust pipes and muffler, and would cool more travelling forward in the CuNiFer tubing.
I would use straight lengths of CuNiFer so I could “rod out” carbon build up.
Cooled EGR reduces
pre-ignition,
reduces NOx,
allows use of lower Octane fuel,
and can improve fuel economy.
The brake lines of my 1995 Ram have already been replaced with CuNiFer brake lines 6 years ago.
CuNiFer metal is an alloy of Copper, Nickel and Iron that is easily bent without kinks and is nearly as corrosion resistant as stainless steel.
