Car shuts off when transmission is put into drive and let off the gas

Try cleaning throttle plate on both sides and IAC hole with choke cleaner and look for a vacuum leak like a hose off/broken etc. Also, check duct work leading to engine for holes or broken grommets on valve covers.

Hi guys. Was the battery recently disconnected or run dead? What you described is a very common problem with a simple fix. If the battery WAS disconnected, drive the car at highway speed with the engine warmed up, then coast for at least seven seconds without touching the pedals.

Scan for codes and checkfuel pressure with a gauge auto parts rent it.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

You gotta hold your left foot on the brake and your right foot on the accelerator pedal. I've had two customers in the past also say they couldn't drive the car. I went to their homes during my lunch break, climbed in with them in the passenger seat, and went out and drove the cars. The procedure is extremely simple, assuming this is due to the battery being disconnected. You still didn't say if that is what started this. I've posted this reply at least 150 times, and no one ever said they couldn't drive the car. If there is something else going on, you have to be more specific with the symptoms.

You also said, "It revs 2.5 at all times". What does that mean? It's idling at two and a half revolutions per minute? Is that 250 rpm? If it's 2500 rpm, how can it be stalling? Our goal is to get your problem solved, but you have to provide accurate information since we aren't there to see what's going on.

Dandy. This is quite different than the problem I described the solution for.

Do what HMAC300 recommended. Start with the diagnostic fault codes. I don't know if this still works on a 2006 model, so you'll just have to try it. Cycle the ignition switch from "off" to "run" three times within five seconds without cranking the engine, leave it in "run", then watch the code numbers show up in the odometer display. Post those numbers for HMAC300 to analyze.

There can be over a dozen different vacuum hose routing diagrams in the service manual for one year, to cover all the different variations of options and emissions systems. You'll find the correct one for your van on the emissions sticker under the hood. It is usually under the center of the hood or on the plastic cover over the center of the radiator.