Help. We have an '89 XJ with the 4.0 that we keep at our winter home in Mexico and it has recently started hesitating at light load in overdrive. Feels like the ignition is completely turned off for just an instant. It may happen once or twice in 20 miles or it may do it every minute or so. If we shift out of overdrive and increase the revs a bit, it either doesn't do it or we can't feel it because of the increased engine speed. I've replaced the plugs, wires, cap and rotor, and run through two cans of injection cleaner and checked all the vital connectors, including the one to the CPS, which has given me trouble in the past. I'm leaving for Mexico this week and would like to take down with me any replacement parts that might solve the problem. Anyone run across this phenomenon before?
Thanks in advance,