when i had a 2j i had the same problem with it cutting out. cheaked everything and cleaned everything and eventually it stopped causing problems. i think it was the kill switch so give **** kill switch a good clean and make sure it is not playing up. check the ignition and kill switch connections are in good condition and clean.
PS isnt that a pgm 2 diagram (5k/6k not 2j) andy? i thought a pmg 1 daigram was wanted.
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94 mc28 SE