Van struggles between 1800-2000rpm power loss
Could be the TPS. Especially if you have cruise control, use it a lot and tend to stay at the same speed all the time. If you do the TPS contact strip will be worn down at the point where you always set it at (i.e. say 70Mph) the metal contact at that point gets worn away since it sits on the same spot all the time. The rest of it is fine, but that spot is bad, when you hit it the power is temp lost, then returns once it goes past that part. Moral of the story. Don't always cruise at the same speed, your TPS will thank you!
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