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89 GTUs revs up and down at stop
On my 1989 GTUs, which has been running great for years, two things happening. Engine was fully warmed up and suddenly, the engine revs up and down at stop. I can't tell what the range is because the tach stopped working too. Since they both seemed to happen at the same time, they might be connected but I cannot find any related posts. Appreciate any thoughts from the everyone here.
TIA
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