I have been having this problem for months now and cant seem to get it fixed. Basically what is happening is when I boost my car hard my idle gets crappy.   when running normal my vacuum gauge reads 20in. And when I get into high boost over 10lbs the idle goes wack. The vacuum gauge then reads 10in 12in and flucutates back and forth. Sounds like if u unhooked 1 spark plug wire so its a miss I guess. My afr are still good tho reading 14. And idle is still at 900.   To try to fix this problem I h

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a voltage drag or lag until warmed up for a few seconds like 5-10 seconds? and then pick back up? would this cause idle dips and slow pick ups of voltage until it levels out? I am thinking the aftermarket wiring bundle that I removed from this car was in it for 20+ of its 25 years and lead to arcing in the switch. Do not know but my voltage is acting flaky and bouncing my idle lights get bright when you step on the throttle pedal.