ok so i have a 2.8 30v with misfires on bank 2 ive already

-replaced pcv system
-plugs gaped @32
-new plug wires
-new coil pack
-new maf
-new timing belt and components
-cleaned intake
-new cps
-new valve cover gaskets
-checked chain links (good)
-new fuel filter
-cleaned injectors
-checked injectors for pulse

one thing i noticed is that my rpms never worked and they just started working again only to stop again this morning

i get the random mis code and the cyl 4,5,6 code along with serperate codes for 4,5,6 with pd on the end they get so bad ive already blown two catalytic converters on that bank.

i have the free vag software and the cable but all it tells me is the same **** my code reader tells me.

idk what to do ive dumped almost 2 gs intho this **** taken it to 4 mechanics and they alllll tell me the different things all of which i have done.

any suggestions would be freakin awesome!

 

What other codes are you getting if any? Have you swapped spark plug wires to see if it follows the wires or not? It sounds like either your timing is off, coil packs, plugs etc....however, since you say you did all those, it possibly could be the ICM since you said your RPM gauge works and then not....if you had an S4 you could switch ICMs and see if it follows....a blocked cat or exhaust can do those codes as well...what color are your new plugs when you pull them out? What condition are they? Have you checked all your vaccum lines for leaks or being unplugged? MAF sensor (clear codes - unplug MAF and see if it runs better or the same)?

 

im pretty sure the 30v dont have a separate icm its built into the coil pack.

 

I have had this same problem exactly for months. Tried everything, plugs, wires, coil packs, timing, checked exhaust and intake, set cams into spec timing, have fuel, spark, and compression. funny thing was, when all the plugs are in and a compression tester in one of the misfire cylinders, low compression. as you take out plugs on that side the compression goes up.