sounds like its advanced a decent amount. same thing happened on my pickup before swapping motors. idled awesome, but had no power and didnt want to rev at all. figured out my chain was 2 teeth off, so i had to mod the dizzy to get enough adjustment, but after that it worked great.
so yea, timing id say!
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87 toyota 4x4 single cab short box pickup, 7MGZE.
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