I am experiencing grief from my 95 Explorer Limited 4.0 V6.  It’s got @
150,000 miles. It was about 130,000 miles when the Check Engine initially
came on and began intermittently.  No consistencies as to what was causing
it.  At first it wouldn’t come on until several hours into a long trip or
at all.  Also, it might come on and then go off after 100 miles on the
same trip.  Since, it now comes on consistently and sooner and remains on
longer.  You could shut the engine off and it may take awhile to come back
on.  One thing I have noticed about the light is that is seems to
consistently come on after a de-acceleration event like coming into a town
with a lower speed limit, but this doesn’t always hold true (an increase in
exhaust gas – makes sense).  I never paid much mind to it as the vehicle
never ran bad.  I was monitoring my mileage and was getting Avg. of 20 –
24 MPG.  Then within the last month, we were making another long trip (400
miles).  I was driving about 70 mph when it just died, I shouldered the car
and thinking I lost the fuel pump, I managed to get it started after about
10 minutes and drove to the destination and then all the way back home
with no troubles.  I can here the fuel pump initiate when turning the key
so, I promptly changed the fuel filter. However, while making another trip
the following week, same story this time in the middle of rush hour traffic
in the city.  Had a little harder time getting it restarted and managed to
limp home with a significant loss of fuel economy 14 MPG.  Borrowed a
diagnostic computer (AUTOXRAY EZ Scan 6000) from my neighbor performed all
the KOEO and KOER tests and got several codes, however this was after he
removed the ICV while the test was going because of the moose horn noise
and the engine died.  Thinking some of the codes were generated from this
event, I erased the computer codes and reran the diagnostic test and a 332
Code (insufficient EGR flow) remained as the only code.  Also, thinking
some of my problem may have been associated with a very dirty throttle
valve sticking from carbon deposits, I cleaned it as well as the opening
to the throttle body.  I also changed the EGR valve and removed and
cleaned all the aluminum tubes to the plenum and exhaust manifold.  Took a
short drive and light has remained to come on as before, but engine did
seem to run better and was getting 20-24 MPG.  Thinking the dying problem
was cured I started on another long trip, went about 30 miles and the
truck died as before. The engine ran rough after restart and turned around
and returned home only getting about 14 MPG just as before. I ran the
diagnostic and received two additional codes - 113 (Intake Air temp sensor
above maximum voltage) and 556 (Fuel pump relay primary circuit failure)
that were in the initial scan. Since this we only drive it around town,
and it runs fine as before. One common factor is that all days the engine
died, the outside temperature was above 90 degrees F.  I am thinking that
the Intake Air temp sensor triggers the fuel pump relay to shut the fuel
pump off as a safety and that is what causes the car to die.  However, I
am not a professional mechanic and all the cars I have worked on in the
past had no computers.  I forgot to mention that was experiencing the same
noise from the ICV that has been previously mentioned in other postings.  I
cleaned it, and the problem seems to have subsided temporarily, but this
was done prior to the last dying episode.  So to my dilemma - are all
these factors related somehow or are they individual problems?  Is the
poor Exhaust Gas Flow causing the Intake air temp to elevate somehow or is
the sensor just failing?  The solenoid that operates the EGR valve seems to
be working as per the sound of air from vacuum coming out of it. It may
just not be totally effective (unsure).  If there was a problem with it, I
don’t have a vacuum gauge to assess it. Is there another way to diagnose?
Also I saw in other postings that the DPFE sensor may be compromised.
Where is that? Is that what I’m calling the solenoid with the vacuum line
to the EGR valve?  Is the ICV part of the problem equation as well - I
kind of ruled it out but may remain to be replaced.  Furthermore, I noted
in an online code manual that the Powertrain Control Module is involved
with these processes.  If it were the culprit of my problem would there
not be a code generated for it as well?  Is the fuel pump relay failure
due to the Intake sensor or are they independent?  Man I hate intermittent
problems!!!!!
Any help would be appreciated as I’m stuck with this vehicle for a while,
I don’t have a grand to spend on parts or would just change them all.
Thanks for your input.

Bryan