304 code cylinder misfires

[euro2envy]

Scanned and code 304 cylinder misfires. Mods are APR stg 2, catless downpipe, cat back exhaust, forge intake, oem dv, coil packs were replaced under recall. can this by to not changing the spark plugs or the diverter valve?? Car drives perfectly fine however.

[low_passat]

This is the order I'd start...
Spark plug>Coils>clean the valves

Are you experiencing rough cold starts? That's usually a sign it's time to clean the valves.

Are you really stage 2 with original diaphragm diverter valve? That's a miracle in itself...

[euro2envy]

yea im really stg 2 with original dv waiting on the awe dv to be back in stock seems everyone jumped on it... any special spark plugs to buy or just from the dealer??

[Weelildubb2.0t]

How many miles on the car?

[brettley]

I had multiple misfires on my stage 1+ tune. Look into your PCV. Thats what it turned out being on mine. I had gone back to the OEM one before a dealer visit, and never put on the BSH revamp after the visit. I threw misfire codes, and rough idle at start. That may very well be your problem, I didnt see any revamp in your mods list . They fail commonly under increased boost from what I have read/experienced.

Good luck on the solution

[euro2envy]

89,000

[euro2envy]

UPDATE: along with code 304 there is an oil leak also.

[nodashi]

how does one clean the valves? Also what spark plugs should i buy?

[Bill6211789]

what motor do you have?

If your an FSI i would say DV is prob blown, but tht may not be ur issue. When did u last have ur spark plugs changed? and if there has been no valve cleaning thennn ur at tht point too.

this is a car at 60k

[nodashi]

How do i clean my valves? Also how much would it cost for someone to clean them for me?

[Bill6211789]

How do i clean my valves? Also how much would it cost for someone to clean them for me?

http://forums.vwvortex.com/showthread.php?4611119

to have a shop do it properly will cost a decent amount i think easily above 500$, unless they walnut blast them which is much quicker

[euro2envy]

what motor do you have?

If your an FSI i would say DV is prob blown, but tht may not be ur issue. When did u last have ur spark plugs changed? and if there has been no valve cleaning thennn ur at tht point too.

this is a car at 60k

FSI motor, i just ordered AWE dv.. anything else i should be checking for.. also valves and spark plugs have never been changed... oil leak another issue i guess?

[euro2envy]

so when running tune the DV tend to blow and what else should be replaced?

[brettley]

so when running tune the DV tend to blow and what else should be replaced?

as I said before, and I have experienced this problem first hand with just a stage 1 APR 91 octane tune, the PVC tends to blow out. A good solution to this problem is the BSH PCV revamp kit.

This is one of the most commonly used kits (atleast what I have seen, and what I purchased)
http://uspmotorsports.com/product_in...roducts_id=770

The intake manifold cap also makes a great mounting point for your AWE diverter valve (that is where I tapped mine) and a boost gauge should you decide to purchase one (the block-off has two tap points).

I have been running my car with this mod on for a good 4 or more months, and have been nothing but pleased with it.