2003 volvo s40 t4
 

Hey guys my volvo have miss when idling but if u rev it the miss is gone its just when it idle i did put new spark plug in and did check plug cable and also check the feul injection plug in and every thing is fine so what can also check what can be the problem thanks

how many miles on car? could be a coil pack is on its way out or has a cracked connector, could be a vacuum leak or dirty intake (MAF, idle air valve). Did you scan for any OBD2 codes (misfires should show up as 030x), could be fuel pressure (sensor etc). How do the car drive? normal boost/power?

Hey it has 324 000km on the clock and it drive fine stil has alot of power it is just when it idle your hear it and the engine shake