1990 dodge B250 van engine bogs when gas pedal is pressed more than half way picks up speed slowly let up. New fuel fliter just put in.?

Here are a few possible causes for your Dodge B250 van's engine bogging down when the gas pedal is pressed more than halfway:

- Clogged fuel injector: A clogged fuel injector can prevent enough fuel from reaching the engine, causing it to bog down. You can try cleaning the fuel injectors with a fuel injector cleaner or having them professionally cleaned.

- Faulty fuel pump: A faulty fuel pump can also prevent enough fuel from reaching the engine. You can check the fuel pressure to see if the fuel pump is working properly.

- Vacuum leak: A vacuum leak can cause the engine to run lean, which can also cause it to bog down. You can check for vacuum leaks by spraying carburetor cleaner around the intake manifold and listening for a change in engine speed.

- Faulty oxygen sensor: A faulty oxygen sensor can cause the engine to run rich, which can also cause it to bog down. You can check the oxygen sensor by using a multimeter to measure the voltage output.

If you are not sure what is causing the engine to bog down, it is best to have it diagnosed by a professional mechanic.