4.0 stalls in N and P when warm?
Over the last couple years my 2001 4.0 4x4 seems to idle a bit slow when I shirt to N or P. I recently chased down a PO401 code (swap out the DPFE-EGR was fine). I don't think the 401 was related. Ran fine w/ the code, runs fine w/out.
Seems now that if the motor is warm, if I shift through N or P w/out feathering the throttle she stalls out. Idle is smooth, if I inch the throttle a bit, but but even when i park and slide the shifter through N it will stall before I get to park.
I cleaned the MAF sensor, no effect. If the motor is cold it idles in N and P fine. There are no error codes. When I unplug the battery (reset codes) I think it runs fine for 10-20 miles, but then gets grumpy again (may be that it just warmed up and now stalls-not sure yet).
Maybe voodoo vacuum stuff? Anybody seen it?