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Message: <blockquote data-quote="Jardon" data-source="post: 1585736" data-attributes="member: 38114"><p>Hey yall! My fiances 1994 mustang gt 5.0 manual has been having this very rough engine vibration the last couple of months. It initially started when it got cold outside. Ive taken a peek at the motor mounts (look fine), the harmonic balancer (doesnt have any wobble to it), replaced the spark plugs, etc. It gets the worst at about 1k rpm and smooths out at higher rpms and basically shakes the shifter at any load range/rpm range and im trying to think and figure out what the most probably cause is. Its got just over 100k miles. It accelerates great after I replaced the spark plugs (3 were loose before I did it which explained a hesitation issue before this happened). I would love any insights on how to diag this or what yall think the most probable causes are. Thank you!</p></blockquote><p></p>