Thread: Tach fluctuates 200 RPM at highway speed
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Old 02-15-2010, 08:48 AM   #3
jtb74168621
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Re: Tach fluctuates 200 RPM at highway speed
Drove on the interstate this weekend with the cruise control on. The tach was steady!

So the problem was caused by two exhaust leaks around each end of a recently installed catalytic converter.
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