Help with a Grand Voyager
 

Hello Guys and Girls ! I am new here and I hope I will enjoy this site.
I will need some help with my grand Voyager 1998 3.3 liter engine, since I bought it 1 1/2 year ago never had any troubles with her, but lately when it is cold in the morning and start it is like working on 5 cylinder and then when warms up get to normal iddle, it has 187,000 km since I got her I have not done any tune up because it was working fine.
Do you think it could be the spark plugs and wires? or may be it is some thing with the fuel system?
Please let me know your comments I really will appreciate your help !

Thanks,

IBM