[quote=Gillbro;6381994]The voltage at the battery and main fuse/relay junction is plenty during and after cranking. The fuel lines are routed propper away from any heat source.
The fuel pressure is 32lbs when running and around 40lbs when the throttle is given. after shut down the pressure rises to around 40lbs (guessing expansion) then over different periods of time will drop to around 20lbs while sitting.
Swapped the MAF sensor and no improvement. It only happens when the van has been driven aggressively and when its hot out after being shut down for 10 - 15 minutes.
Please help with any other ideas. Thanks!