|
Registered User
Join Date: Oct 2013
Location: Tularosa, New Mexico
Posts: 125
|
Check your voltage regulator. Mine is an '82 and inside the fan but I think yours is external in the back. Mine did the same thing. Brushes were really worn down. Swapped and no more bouncy tach.
HTH,
Leah
__________________
Leah
'82 Guards Red 911SC 
'06 Ford Expedition - work truck 
'04 Ford F350 King Ranch - hubby's truck
'07 Lincoln Navigator Ultimate - family
|