I have a 2002 Grand Cherokee, and I seem to have a problem with this
vehicle once I drive it twenty miles or more.  After turning the car
off and trying to restart it, it has a delay of one to fifteen minutes
(depending on the distance driven).  The longer the distance, the
longer it seems to delay restarting. It also seems the warmer the
vehicle gets, the longer the delay.  My opinion was that it was
possibly a heat related problem so I replaced the starter, wrapped the
exhaust pipe and converter to keep the heat from the starter, and I
have cleaned the battery cables (It has a new battery also).  I still
have the problem.

When I try to turn the ignition on, sometimes the dash lights will
turn on and other times they don't.  This only happens when the
vehicle is warmed up.  Has anyone ever had a problem like this or any
suggestions?