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You can check the trigger points with an ohmmeter from each of the outboard
terminals to the center. Both should pulse on and off as you crank the
engine. Good to take the high-tension coil wire out of the coil while you
do this and DON'T hold your elbow there while you are using the ohmmeter!
Why do you think the MAPSensor is bad?
Sometimes apparent MAPSensor and ECU problems can be remedied by unplugging
the big plug from the computer and plugging it back up.
--
George Downs Bartlesville, Heart of the USA!
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