Hey all i got a 02 1500 QC LB 3.55 with the 4.7 and when im sitting at lights i feel vibrations coming from the engine. the rpm go up and down while stopped its just rough. im about to change my spark plugs with ngk's but has anyone had this problem (if so what did you do to get rid of it) or two does anyone know if there is an update for the 4.7 from 2002 that i need to get. Thanks in advance

 

how long ago was your last tune up?

 

i dont know exactly when the last tune up was but im doing mine right now im changing the spark plugs this weeks i have chagned the oil with mobil 1 syntheic oil and mopar filter and new k&n filter, it just rolled over 61k any suggestions?

 

I'm betting you have fouled/worn plugs or dirty injectors