You have a problem with the front control module or the integrated power module. #1 in the pic below is the front control module. Try unpluging it and make sure that there is no grime in the terminals. We had a van with this same problem a few weeks ago and the integrated power module(fusebox) was bad. But I had another van with this same problem and the front control module was bad. No real good way to tell which is bad....You can also reset the modules by unhooking BOTH battery cables, wait 5 minutes and then touch the battery cables together for a few seconds(make sure they are NOT hooked to the battery). The van may run like crap for a few minutes after you hook it all back up until the pcm relearns its parameters....Call me if you are unsure of these directions.....DAVID