We launched a trip from Phoenix to No. Calif.
  At 450 miles into the trip our 87 engine, that has been running really good for the last 3K miles, began to stumble.  We've been using Chevron all along the way, the problem started 100 miles after a fill up with Chevron.  Talked to our mechanic... but not being at the shop we haven't come up with an answer.

  The symptoms are that it feels like it is cutting out intermittently.  We don't know if its ignition or fuel.  At first the cutting out was radical and we hardly made to our destination.  Then at our mechanic's advice, we checked  the blue plug connecton that goes to the thermostat housing and wiggled the spark plug wires to see if they were loose... this may have helped it some... not sure, but afterward it seemed to not be as radical. We can actually drive it at high speed now and it cuts out only once in awhile.  Doesn't seem like it will die and we'll get there, just a bit obnoxious!

  Sometimes it caughs several times, sometimes only once.  The tach drops each time, but not all the way to 0.  The fuel pump does not sound loud.  We had a new ox sys 2K ago and everything else was replaced  within the last 3K.  We don't find it related to hills or high temp or low.  No overheating issues.  No head leaking.

  We are in Carpenteria right now.  Tomorrow heading up 101 toward SLO and then San Jose.  Any ideas would be much appreciated... or a shop along the way that would pay to stop at.  I don't look forward to this for another two thousand miles.  Mad Madeline

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