Got a question for all you Zuk heads. I have a 92 Trac with 156000 I bought this when it was like new back in 94 so I have done all the service and all the work myself...I know the vehicle pretty good....anyway I have put 1 1/2 coil spacers and front strut extensions and 2" body lift from Sky Manu. I have put new struts and crown vic rear shocks, new Dunlop Rover MTs. The Vehicle was doing great!...UNTILL  she is now running rough....Has a pretty bad miss in the morning and under load.....when I hit the highway I can tell its still missing but not as bad. When the vehicle is good and warm...it gets better but still not right. It dosent burn any oil, or smoke. Has New spark pugs, wires, cap, rotor button,  fuel filter about a year ago....then just changed the plugs again.....Checked spark to all cylinders and looks good......WHAT DO YA GUYS THINK? any sugestions would be helpful....thanks

Sam

With 156K on it have you replaced the timing belt? If not it's due. It could be the old timing belt stretching and getting out of timing (or maybe even sliped a tooth or two.

Zig

hello
the timing belt is a good start like zukipilot said. but you could also have carbon build up around the valves or even burnt run a compression test on it and why you have the #1 plug out of it i would check the timing as zukipilot said.
thanks rick.