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vectorit · 10-07-2009, 11:59 PM

The tach sounds as though it has a loose connection to the coil.

What kind of fan are you running? If it's a clutch fan, it could be bad. That and check all the blades, and make sure they are solid.

The mis could be causing one hole to not fire long enough to cause some funny business, especially if it is happening on either cyl # 5 or 7. But I'm guessing not. What kind of distributer?

Check everything that rotates off the crank.

10-07-2009, 11:59 PM	#8
vectorit What? Join Date: Jun 2007 Location: Southern California Posts: 7,617	Re: vibration.........from where????? The tach sounds as though it has a loose connection to the coil. What kind of fan are you running? If it's a clutch fan, it could be bad. That and check all the blades, and make sure they are solid. The mis could be causing one hole to not fire long enough to cause some funny business, especially if it is happening on either cyl # 5 or 7. But I'm guessing not. What kind of distributer? Check everything that rotates off the crank. __________________ Chris 1968 K20 Suburban 1972 K10 LWB PU