replaced spark plugs, now car runs like ****

[cavdo]

hey guys,

i replaced the spark plug wires on my 98 mustang GT engine (71K miles, 4.6L) with Plantinum bosh 4+. and the car ran like ****. then i took the bosh spark plugs and replaced them with the motorsport spark plugs, and my car still runns like ****. when i say that my car runs like **** i mean that my car jerks a lot. before the spark plug replacement, my car ran perfect.

do you guys have any suggestions? are my ignition wires busted, or are the plugs bad, or what could be going on?

PS: the jerking is really bad between the idle and 2000 rpm range. in higher rpms i notice significant power loss.


Any advice would be helpfull,

thank you,
avdo