Missing Tail Pipes and Back Pressure

[shertex]

I am now missing both of the tail pipes on my muffler on my 91 300D. (Yes, I know I need a new muffler.) Can that create back pressure issues? I ask because the car is noticeably sluggish these days. Filters fine, wastegate conversion, etc... Hoping it's not the turbo.

[87tdwagen]

You could have an exhaust restriction. Dont remember if the 91 had a catalyst or not, but that can and does clog with soot over time, possibly the muffler as well, tho less likely. I had that happen on a 87 300D. Replacement with a straight pipe cured it. A EGT gauge helps tremendously in diagnosing this as the temps will rise well above normal when there are issues with combustion or exhaust restrictions.

[shertex]

Originally Posted by 87tdwagen

You could have an exhaust restriction. Dont remember if the 91 had a catalyst or not, but that can and does clog with soot over time, possibly the muffler as well, tho less likely. I had that happen on a 87 300D. Replacement with a straight pipe cured it. A EGT gauge helps tremendously in diagnosing this as the temps will rise well above normal when there are issues with combustion or exhaust restrictions.

The 91 does not have a cat. Since I need to replace the muffler anyway, maybe I should just do that and see where things stand.

Resonator was eliminated some time ago....so with a new muffler things should be nice and clean.

[dieselbenz1]

Hopefully your down pipe is ok I had to wait 3 months for a special run from the manufacturer to produce mine.