1990 350SDL, "Grandpa's Roadster" Project Car
No, that's the air flow meter. The throttle is down stream from there.The throttle plate is the large gold tinted disk on the intake manifold that moves up and down when the accelerator is pressed, correct?
In the photo of the plugs, are they in any particular order? Can you compare them to the ones in there now, cylinder by cylinder? Did you go through the firing order to verify the plug wires are correct?