My van keeps shutting off while driving. Doesn't sputter or anything, it just dies out. Check engine light is not on and I have had it scanned for any codes that may be stored. There are none except for P1684 which means that the battery has been diconnected within the last 50 start ups, which it has.
I've replaced the crankshaft position sensor and the coolant temperature sensor as well as the intake air sensor (some call it the intake air charger). I've also taken the IAC motor out and cleaned it thoroughly and let it dry out completely before reinstalling. Cleaned the throttle plate and the opening of the throttle, as far as I could reach in with a rag and carb cleaner and let it air dry.
Checked the feul pressure and it's good at 63psi. Had a friend bring his scan tool, all sensors checked out fine except the coolant sensor was reading at -198 F on the freeze screen which as stated above was changed and is now reading properly.
THE WIERD STUFF!!!!!! I can be driving along just fine, then all of a sudden the engine dies. This could happen 2 minutes after starting the van after it sat out all night, or it can happen a half hour to an hour after the van has been driven and warmed up to normal operating temp. I try to just coast the car when it dies, put it on neautral and try to start it up, it just cranks but doesn't start. I've noticed that I HAVE to pull over, turn the key to the off position and wait a few seconds and the car will turn on just fine but most of the time when I put it on drive and give it gas, it shuts off again and I have to repeat the process of turning the key to the off position again.
One test we ran was when the car died, I did NOT return the key to the off postion, I left it at the accessory position and checked for spark. It had no spark while trying to turn on the engine. Did the same thing for pulse and it had no pulse either. Feul pressure was fine. Turned the key to the off position, waited a few seconds, turned the key and the engine turned on showing spark and pulse just fine.
ANOTHER WEIRD THING!!!!! A couple of days ago when the van died out on me after maybe 45 minutes of driving, I was able to start the van back up, but as soon as I would put the gear on drive, the engine just shut down. It did this to me several several times in a row and left me stranded for hours. Finally I was able to have the engine running and the gear on drive, but as soon as I gave it a little gas it would shut off. I had to literally drive the van home at 4 to 5mph, I just put it on drive and released the brake pedal and not give it gas.
Has anyone ran into this odd problem before? Any help will be greatly appreciated.
The engine is a 3.8. All fluid levels are fine.
Crank sensor replaced.
Coolant sensor replaced.
Air intake sensor (air charge sensor) replaced.
IAC motor removed and cleaned and reinstalled.
Throttle body cleaned.
Used scan tool, everything looks normal.
Update! I changed the cam sensor yesterday to no avail. Was still stalling afterwards. I took the van to the dealer today to get a new programmed key. I also had the PCM reflashed. There was one update available for my van. My van is still stalling, I was hoping after spending the $250 @ the dealer would have solved my problems. I need help cuz I dont want to keep throwing money away.