Nissan Repair: 95 Quest vapor lock?, fuel pressure gauge, gague

Question
On a hot day, over 95 degrees, the Quest has stalled and died twice.  Both times we had been running for more than 30 minutes, running both front and rear air conditioning, running constant speed and climbing in elevation, not stop and go traffic and have more than a half of tank of gas.  It just stops running, it will start momentarily, but it chugs and dies.  Once we release pressure out of the fuel cap and let it cool for 15 minutes it starts and runs fine.  The van has not overheated when this happens, the temp gague is on the lower half of normal range.

We have recently changed the fuel filter in the engine compartment.

We bought the van at 60,000 miles and now the van has 154,000 miles on it.  This the the first issue we have had that makes us not trust the vehicle to get us home.

Answer
Patrick,

This is either fuel or ignition.  The only way to know for sure is to get a fuel pressure gauge and hook it up on the fuel rail and drive it until it dies.  If the fuel pressure falls off you have found the problem.  If not the ignition module is overheating and that would cause the condition you describe.