Most likely your brush is a little clogged, so when you're pulling it back, it's adding more pressure to it, and it has a safety turn off to make sure you don't burn out the motor. When you're going forward it makes it less stressed so it senses that it can turn back on.
You might need to replace it. Check out:
http://uclean.com/catalog/productInfo/equipment/equipment_parts/vacuum_brush_for_sr12_srxp12_srs12.html
or www.uClean.com
They carry a lot of Windsor Vacuum stuff.
Check all vacuum lines.
vacuum unit behind glove box was disconnected.
In a mueseum
My guess is its vacuum related. High vacuum at idle and low vacuum during acceleration is normal. Look for a vacuum leak
anti theft going out
13bn771g729 shuts off when put in reverse
Duke's. It shuts down and he starts going to McGinty's (sp?)
When a 1998 VW Passat shuts off after driving the vehicle may be experiencing vacuum related problems. The best course of action is to perform a diagnostic test and see what codes are being shown in the engines computer.
Check for a vacuum leak Could be the check valve at the power brake booster
You are going to get stuck, if it ever accidently shuts off/stalls.
The alternator is going bad, may need to be replaced soon
It is possible. Try cleaning your throttle body. If this does not work, search for vacuum leaks in your intake. Then check your idle speed at operating temperatures.