need help with 2002 ml320 rough idle code says cyl 3&6 tried swaping coil with cyl 4
code still read trouble with cyls 3&6

 

WHAT IS THE CODE..................YOU HAVE TO GIVE ME THE CODE.........IF YOU DON'T HAVE A CODE... GO TO AUTO ZONE THEY WILL HOOK UP THEIR SCANNER FOR YOU FREE OF CHARGE......

 

Your EGR valve is stuck open

 

Hi...I just had a rough idle on my 2000 for about a month or so. Then this past Sunday my check engine light came on and it started running terrible. Autozone diagnostics said it as the #4 cylinder. We changed all of my spark plugs then diagnostics said misfire in #4 so we changed the wires and now it's running like a champ again. It probably just needs a good tune up. Good luck and if you know what you're doing, do it yourself...it'll save you lots of $.

 

you ii be very very supriesd,misfire on cylinders,even after swapin the coil packs,its your air mass sensor in other ways its called MAF,try a donour maf 95%its gonna run smooth,let me no hw u get on .........................................NAZ