Originally Posted by Wadsworth

Cleaning the throttle body and a scan is where I would start (basically no cost to you). If the hose is truly a missing, I would replace the missing hose.

Symptoms of an intermittent acceleration problem I had with my SRT6.
1) Car would be fine for several minutes until it warmed up.
2) Once warm if I accelerated hard or even semi hard the RPMS would go up normally, but car would only pick up 1 or 2 MPH.
3) If I lifted my foot off the pedal and accelerated normally it respond as normal.

Solution.
1) Replaced the conductor plate in the transmission. There is a speed sensor on the plate. I believe that was bad and the transmission did not know what to do under harder acceleration.
Problem solved yes. Car still seemed a little slower than normal. 90 % there.
2) Replaced supercharger pump. I had ordered a new pump when I bought the car (newer -1 pump) and just had it sitting there for a couple of years. This pump is known to wear out before 30,000 miles.
At that point my car had about 11,000 miles and was 15 years old. What a difference!!! The car was much faster than the day I bought it.