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Thanks for following up Phil. So today I swapped the relays ...again..still the same issue. I also adjusted the the TPS as per the faqs....still the same issue. Idle is normal. I somehow think you are on the right track as far as an air disruption issue and will probably look into this next. Remember, my 91 is a rex regina so there is no Mass airflow sensor but a temperature sensor and a manifold absolute pressure sensor. When parked , if I push on the gas pedal some ( not floored) but enough to get at least 3-4k rpms the engine would hesitate at the 1300-1500 rpm range...kinda producing a vroom...vroom ...vroom then would sometimes rev passed that like "normal" . Funny thing is a slow and gradual push on the pedal results in a very minor hiccup at those rpms and will keep revving to what the push on the gas pedal commands. As I type I decided to check the hard plastic like vacuum line to the MAP sensor which in my 91 is located just aft of the drivers side strut mount , screwed unto the strut brace. The line is not cracked and holds pressure when I blow into it. Disconnecting it from the manifold results in the engine shutting down. I wonder if the MAP sensor is bad?
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